Merge branch 'master' into alarm_openloop
diff --git a/README.md b/README.md
index f894def..033e09b 100644
--- a/README.md
+++ b/README.md
@@ -3,6 +3,8 @@
 [gRPC - An RPC library and framework](http://github.com/grpc/grpc)
 ===================================
 
+[![Join the chat at https://gitter.im/grpc/grpc](https://badges.gitter.im/grpc/grpc.svg)](https://gitter.im/grpc/grpc?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
+
 Copyright 2015-2016 Google Inc.
 
 #Documentation
diff --git a/binding.gyp b/binding.gyp
index 3659bfc..82e36c4 100644
--- a/binding.gyp
+++ b/binding.gyp
@@ -55,7 +55,8 @@
           'UNICODE',
           '_UNICODE',
           'NOMINMAX',
-          'OPENSSL_NO_ASM'
+          'OPENSSL_NO_ASM',
+          'GPR_BACKWARDS_COMPATIBILITY_MODE'
         ],
         "msvs_settings": {
           'VCCLCompilerTool': {
@@ -78,7 +79,8 @@
           # supports ALPN. The target is "[major].[minor].[patch]". We split by
           # periods and take the first field to get the major version.
         'defines': [
-          'TSI_OPENSSL_ALPN_SUPPORT=<!(echo <(target) | cut -d. -f1)'
+          'TSI_OPENSSL_ALPN_SUPPORT=<!(echo <(target) | cut -d. -f1)',
+          'GPR_BACKWARDS_COMPATIBILITY_MODE'
         ],
         'include_dirs': [
           '<(node_root_dir)/deps/openssl/openssl/include',
diff --git a/include/grpc++/create_channel.h b/include/grpc++/create_channel.h
index aff9c29..e9ccb51 100644
--- a/include/grpc++/create_channel.h
+++ b/include/grpc++/create_channel.h
@@ -36,6 +36,7 @@
 
 #include <memory>
 
+#include <grpc++/channel.h>
 #include <grpc++/security/credentials.h>
 #include <grpc++/support/channel_arguments.h>
 #include <grpc++/support/config.h>
diff --git a/include/grpc++/impl/codegen/sync_stream.h b/include/grpc++/impl/codegen/sync_stream.h
index 33d25e8..9ae48bd 100644
--- a/include/grpc++/impl/codegen/sync_stream.h
+++ b/include/grpc++/impl/codegen/sync_stream.h
@@ -193,6 +193,15 @@
     cq_.Pluck(&ops);
   }
 
+  void WaitForInitialMetadata() {
+    GPR_ASSERT(!context_->initial_metadata_received_);
+
+    CallOpSet<CallOpRecvInitialMetadata> ops;
+    ops.RecvInitialMetadata(context_);
+    call_.PerformOps(&ops);
+    cq_.Pluck(&ops);  // status ignored
+  }
+
   using WriterInterface<W>::Write;
   bool Write(const W& msg, const WriteOptions& options) GRPC_OVERRIDE {
     CallOpSet<CallOpSendMessage> ops;
@@ -213,6 +222,9 @@
   /// Read the final response and wait for the final status.
   Status Finish() GRPC_OVERRIDE {
     Status status;
+    if (!context_->initial_metadata_received_) {
+      finish_ops_.RecvInitialMetadata(context_);
+    }
     finish_ops_.ClientRecvStatus(context_, &status);
     call_.PerformOps(&finish_ops_);
     GPR_ASSERT(cq_.Pluck(&finish_ops_));
@@ -221,7 +233,8 @@
 
  private:
   ClientContext* context_;
-  CallOpSet<CallOpGenericRecvMessage, CallOpClientRecvStatus> finish_ops_;
+  CallOpSet<CallOpRecvInitialMetadata, CallOpGenericRecvMessage,
+            CallOpClientRecvStatus> finish_ops_;
   CompletionQueue cq_;
   Call call_;
 };
@@ -292,7 +305,10 @@
   }
 
   Status Finish() GRPC_OVERRIDE {
-    CallOpSet<CallOpClientRecvStatus> ops;
+    CallOpSet<CallOpRecvInitialMetadata, CallOpClientRecvStatus> ops;
+    if (!context_->initial_metadata_received_) {
+      ops.RecvInitialMetadata(context_);
+    }
     Status status;
     ops.ClientRecvStatus(context_, &status);
     call_.PerformOps(&ops);
diff --git a/include/grpc/census.h b/include/grpc/census.h
index 6313b19..dfa3bd7 100644
--- a/include/grpc/census.h
+++ b/include/grpc/census.h
@@ -59,15 +59,15 @@
  * census_initialize() will return a non-zero value. It is an error to call
  * census_initialize() more than once (without an intervening
  * census_shutdown()). */
-CENSUS_API int census_initialize(int features);
-CENSUS_API void census_shutdown(void);
+CENSUSAPI int census_initialize(int features);
+CENSUSAPI void census_shutdown(void);
 
 /** Return the features supported by the current census implementation (not all
  * features will be available on all platforms). */
-CENSUS_API int census_supported(void);
+CENSUSAPI int census_supported(void);
 
 /** Return the census features currently enabled. */
-CENSUS_API int census_enabled(void);
+CENSUSAPI int census_enabled(void);
 
 /**
   A Census Context is a handle used by Census to represent the current tracing
@@ -145,16 +145,16 @@
    tags used in its creation.
    @return A new, valid census_context.
 */
-CENSUS_API census_context *census_context_create(
+CENSUSAPI census_context *census_context_create(
     const census_context *base, const census_tag *tags, int ntags,
     census_context_status const **status);
 
 /* Destroy a context. Once this function has been called, the context cannot
    be reused. */
-CENSUS_API void census_context_destroy(census_context *context);
+CENSUSAPI void census_context_destroy(census_context *context);
 
 /* Get a pointer to the original status from the context creation. */
-CENSUS_API const census_context_status *census_context_get_status(
+CENSUSAPI const census_context_status *census_context_get_status(
     const census_context *context);
 
 /* Structure used for iterating over the tegs in a context. API clients should
@@ -168,18 +168,18 @@
 } census_context_iterator;
 
 /* Initialize a census_tag_iterator. Must be called before first use. */
-CENSUS_API void census_context_initialize_iterator(
+CENSUSAPI void census_context_initialize_iterator(
     const census_context *context, census_context_iterator *iterator);
 
 /* Get the contents of the "next" tag in the context. If there are no more
    tags, returns 0 (and 'tag' contents will be unchanged), otherwise returns 1.
    */
-CENSUS_API int census_context_next_tag(census_context_iterator *iterator,
-                                       census_tag *tag);
+CENSUSAPI int census_context_next_tag(census_context_iterator *iterator,
+                                      census_tag *tag);
 
 /* Get a context tag by key. Returns 0 if the key is not present. */
-CENSUS_API int census_context_get_tag(const census_context *context,
-                                      const char *key, census_tag *tag);
+CENSUSAPI int census_context_get_tag(const census_context *context,
+                                     const char *key, census_tag *tag);
 
 /* Tag set encode/decode functionality. These functionas are intended
    for use by RPC systems only, for purposes of transmitting/receiving contexts.
@@ -201,17 +201,16 @@
            [buffer, buffer + *print_buf_size) and binary tags into
            [returned-ptr, returned-ptr + *bin_buf_size) (and the returned
            pointer should be buffer + *print_buf_size) */
-CENSUS_API char *census_context_encode(const census_context *context,
-                                       char *buffer, size_t buf_size,
-                                       size_t *print_buf_size,
-                                       size_t *bin_buf_size);
+CENSUSAPI char *census_context_encode(const census_context *context,
+                                      char *buffer, size_t buf_size,
+                                      size_t *print_buf_size,
+                                      size_t *bin_buf_size);
 
 /* Decode context buffers encoded with census_context_encode(). Returns NULL
    if there is an error in parsing either buffer. */
-CENSUS_API census_context *census_context_decode(const char *buffer,
-                                                 size_t size,
-                                                 const char *bin_buffer,
-                                                 size_t bin_size);
+CENSUSAPI census_context *census_context_decode(const char *buffer, size_t size,
+                                                const char *bin_buffer,
+                                                size_t bin_size);
 
 /* Distributed traces can have a number of options. */
 enum census_trace_mask_values {
@@ -221,10 +220,10 @@
 
 /** Get the current trace mask associated with this context. The value returned
     will be the logical or of census_trace_mask_values values. */
-CENSUS_API int census_trace_mask(const census_context *context);
+CENSUSAPI int census_trace_mask(const census_context *context);
 
 /** Set the trace mask associated with a context. */
-CENSUS_API void census_set_trace_mask(int trace_mask);
+CENSUSAPI void census_set_trace_mask(int trace_mask);
 
 /* The concept of "operation" is a fundamental concept for Census. In an RPC
    system, and operation typcially represents a single RPC, or a significant
@@ -272,7 +271,7 @@
 
   @return A timestamp representing the operation start time.
 */
-CENSUS_API census_timestamp census_start_rpc_op_timestamp(void);
+CENSUSAPI census_timestamp census_start_rpc_op_timestamp(void);
 
 /**
   Represent functions to map RPC name ID to service/method names. Census
@@ -324,7 +323,7 @@
 
    @return A new census context.
  */
-CENSUS_API census_context *census_start_client_rpc_op(
+CENSUSAPI census_context *census_start_client_rpc_op(
     const census_context *context, int64_t rpc_name_id,
     const census_rpc_name_info *rpc_name_info, const char *peer, int trace_mask,
     const census_timestamp *start_time);
@@ -332,8 +331,8 @@
 /**
   Add peer information to a context representing a client RPC operation.
 */
-CENSUS_API void census_set_rpc_client_peer(census_context *context,
-                                           const char *peer);
+CENSUSAPI void census_set_rpc_client_peer(census_context *context,
+                                          const char *peer);
 
 /**
    Start a server RPC operation. Returns a new context to be used in future
@@ -353,7 +352,7 @@
 
    @return A new census context.
  */
-CENSUS_API census_context *census_start_server_rpc_op(
+CENSUSAPI census_context *census_start_server_rpc_op(
     const char *buffer, int64_t rpc_name_id,
     const census_rpc_name_info *rpc_name_info, const char *peer, int trace_mask,
     census_timestamp *start_time);
@@ -383,9 +382,9 @@
 
    @return A new census context.
  */
-CENSUS_API census_context *census_start_op(census_context *context,
-                                           const char *family, const char *name,
-                                           int trace_mask);
+CENSUSAPI census_context *census_start_op(census_context *context,
+                                          const char *family, const char *name,
+                                          int trace_mask);
 
 /**
   End an operation started by any of the census_start_*_op*() calls. The
@@ -396,7 +395,7 @@
   @param status status associated with the operation. Not interpreted by
                 census.
 */
-CENSUS_API void census_end_op(census_context *context, int status);
+CENSUSAPI void census_end_op(census_context *context, int status);
 
 #define CENSUS_TRACE_RECORD_START_OP ((uint32_t)0)
 #define CENSUS_TRACE_RECORD_END_OP ((uint32_t)1)
@@ -408,8 +407,8 @@
     @param buffer Pointer to buffer to use
     @param n Number of bytes in buffer
 */
-CENSUS_API void census_trace_print(census_context *context, uint32_t type,
-                                   const char *buffer, size_t n);
+CENSUSAPI void census_trace_print(census_context *context, uint32_t type,
+                                  const char *buffer, size_t n);
 
 /** Trace record. */
 typedef struct {
@@ -430,7 +429,7 @@
          while scanning is ongoing.
   @returns 0 on success, non-zero on failure (e.g. if a scan is already ongoing)
 */
-CENSUS_API int census_trace_scan_start(int consume);
+CENSUSAPI int census_trace_scan_start(int consume);
 
 /** Get a trace record. The data pointed to by the trace buffer is guaranteed
     stable until the next census_get_trace_record() call (if the consume
@@ -441,10 +440,10 @@
            census_trace_scan_start()), 0 if there is no more trace data (and
            trace_record will not be modified) or 1 otherwise.
 */
-CENSUS_API int census_get_trace_record(census_trace_record *trace_record);
+CENSUSAPI int census_get_trace_record(census_trace_record *trace_record);
 
 /** End a scan previously started by census_trace_scan_start() */
-CENSUS_API void census_trace_scan_end();
+CENSUSAPI void census_trace_scan_end();
 
 /* Core stats collection API's. The following concepts are used:
    * Aggregation: A collection of values. Census supports the following
@@ -475,8 +474,8 @@
 } census_value;
 
 /* Record new usage values against the given context. */
-CENSUS_API void census_record_values(census_context *context,
-                                     census_value *values, size_t nvalues);
+CENSUSAPI void census_record_values(census_context *context,
+                                    census_value *values, size_t nvalues);
 
 /** Type representing a particular aggregation */
 typedef struct census_aggregation_ops census_aggregation_ops;
@@ -508,24 +507,24 @@
 
 /* TODO(aveitch): consider if context is the right argument type to pass in
    tags. */
-CENSUS_API census_view *census_view_create(
+CENSUSAPI census_view *census_view_create(
     uint32_t metric_id, const census_context *tags,
     const census_aggregation *aggregations, size_t naggregations);
 
 /** Destroy a previously created view. */
-CENSUS_API void census_view_delete(census_view *view);
+CENSUSAPI void census_view_delete(census_view *view);
 
 /** Metric ID associated with a view */
-CENSUS_API size_t census_view_metric(const census_view *view);
+CENSUSAPI size_t census_view_metric(const census_view *view);
 
 /** Number of aggregations associated with view. */
-CENSUS_API size_t census_view_naggregations(const census_view *view);
+CENSUSAPI size_t census_view_naggregations(const census_view *view);
 
 /** Get tags associated with view. */
-CENSUS_API const census_context *census_view_tags(const census_view *view);
+CENSUSAPI const census_context *census_view_tags(const census_view *view);
 
 /** Get aggregation descriptors associated with a view. */
-CENSUS_API const census_aggregation *census_view_aggregrations(
+CENSUSAPI const census_aggregation *census_view_aggregrations(
     const census_view *view);
 
 /** Holds all the aggregation data for a particular view instantiation. Forms
@@ -545,11 +544,10 @@
   @param view View from which to get data.
   @return Full set of data for all aggregations for the view.
 */
-CENSUS_API const census_view_data *census_view_get_data(
-    const census_view *view);
+CENSUSAPI const census_view_data *census_view_get_data(const census_view *view);
 
 /** Reset all view data to zero for the specified view */
-CENSUS_API void census_view_reset(census_view *view);
+CENSUSAPI void census_view_reset(census_view *view);
 
 #ifdef __cplusplus
 }
diff --git a/include/grpc/compression.h b/include/grpc/compression.h
index a2b65b0..acc168a 100644
--- a/include/grpc/compression.h
+++ b/include/grpc/compression.h
@@ -46,33 +46,33 @@
 /** Parses the first \a name_length bytes of \a name as a
  * grpc_compression_algorithm instance, updating \a algorithm. Returns 1 upon
  * success, 0 otherwise. */
-GRPC_API int grpc_compression_algorithm_parse(
+GRPCAPI int grpc_compression_algorithm_parse(
     const char *name, size_t name_length,
     grpc_compression_algorithm *algorithm);
 
 /** Updates \a name with the encoding name corresponding to a valid \a
  * algorithm.  Returns 1 upon success, 0 otherwise. */
-GRPC_API int grpc_compression_algorithm_name(
+GRPCAPI int grpc_compression_algorithm_name(
     grpc_compression_algorithm algorithm, char **name);
 
 /** Returns the compression algorithm corresponding to \a level.
  *
  * It abort()s for unknown levels . */
-GRPC_API grpc_compression_algorithm
+GRPCAPI grpc_compression_algorithm
 grpc_compression_algorithm_for_level(grpc_compression_level level);
 
-GRPC_API void grpc_compression_options_init(grpc_compression_options *opts);
+GRPCAPI void grpc_compression_options_init(grpc_compression_options *opts);
 
 /** Mark \a algorithm as enabled in \a opts. */
-GRPC_API void grpc_compression_options_enable_algorithm(
+GRPCAPI void grpc_compression_options_enable_algorithm(
     grpc_compression_options *opts, grpc_compression_algorithm algorithm);
 
 /** Mark \a algorithm as disabled in \a opts. */
-GRPC_API void grpc_compression_options_disable_algorithm(
+GRPCAPI void grpc_compression_options_disable_algorithm(
     grpc_compression_options *opts, grpc_compression_algorithm algorithm);
 
 /** Returns true if \a algorithm is marked as enabled in \a opts. */
-GRPC_API int grpc_compression_options_is_algorithm_enabled(
+GRPCAPI int grpc_compression_options_is_algorithm_enabled(
     const grpc_compression_options *opts, grpc_compression_algorithm algorithm);
 
 #ifdef __cplusplus
diff --git a/include/grpc/grpc.h b/include/grpc/grpc.h
index ac4c536..5113645 100644
--- a/include/grpc/grpc.h
+++ b/include/grpc/grpc.h
@@ -55,11 +55,11 @@
  * functionality lives in grpc_security.h.
  */
 
-GRPC_API void grpc_metadata_array_init(grpc_metadata_array *array);
-GRPC_API void grpc_metadata_array_destroy(grpc_metadata_array *array);
+GRPCAPI void grpc_metadata_array_init(grpc_metadata_array *array);
+GRPCAPI void grpc_metadata_array_destroy(grpc_metadata_array *array);
 
-GRPC_API void grpc_call_details_init(grpc_call_details *details);
-GRPC_API void grpc_call_details_destroy(grpc_call_details *details);
+GRPCAPI void grpc_call_details_init(grpc_call_details *details);
+GRPCAPI void grpc_call_details_destroy(grpc_call_details *details);
 
 /** Registers a plugin to be initialized and destroyed with the library.
 
@@ -69,7 +69,7 @@
     (and hence so will \a init and \a destroy).
     It is safe to pass NULL to either argument. Plugins are destroyed in
     the reverse order they were initialized. */
-GRPC_API void grpc_register_plugin(void (*init)(void), void (*destroy)(void));
+GRPCAPI void grpc_register_plugin(void (*init)(void), void (*destroy)(void));
 
 /** Initialize the grpc library.
 
@@ -77,7 +77,7 @@
     (To avoid overhead, little checking is done, and some things may work. We
     do not warrant that they will continue to do so in future revisions of this
     library). */
-GRPC_API void grpc_init(void);
+GRPCAPI void grpc_init(void);
 
 /** Shut down the grpc library.
 
@@ -85,13 +85,13 @@
     executing within the grpc library.
     Prior to calling, all application owned grpc objects must have been
     destroyed. */
-GRPC_API void grpc_shutdown(void);
+GRPCAPI void grpc_shutdown(void);
 
 /** Return a string representing the current version of grpc */
-GRPC_API const char *grpc_version_string(void);
+GRPCAPI const char *grpc_version_string(void);
 
 /** Create a completion queue */
-GRPC_API grpc_completion_queue *grpc_completion_queue_create(void *reserved);
+GRPCAPI grpc_completion_queue *grpc_completion_queue_create(void *reserved);
 
 /** Blocks until an event is available, the completion queue is being shut down,
     or deadline is reached.
@@ -101,9 +101,9 @@
 
     Callers must not call grpc_completion_queue_next and
     grpc_completion_queue_pluck simultaneously on the same completion queue. */
-GRPC_API grpc_event grpc_completion_queue_next(grpc_completion_queue *cq,
-                                               gpr_timespec deadline,
-                                               void *reserved);
+GRPCAPI grpc_event grpc_completion_queue_next(grpc_completion_queue *cq,
+                                              gpr_timespec deadline,
+                                              void *reserved);
 
 /** Blocks until an event with tag 'tag' is available, the completion queue is
     being shutdown or deadline is reached.
@@ -116,9 +116,9 @@
 
     Completion queues support a maximum of GRPC_MAX_COMPLETION_QUEUE_PLUCKERS
     concurrently executing plucks at any time. */
-GRPC_API grpc_event
-grpc_completion_queue_pluck(grpc_completion_queue *cq, void *tag,
-                            gpr_timespec deadline, void *reserved);
+GRPCAPI grpc_event grpc_completion_queue_pluck(grpc_completion_queue *cq,
+                                               void *tag, gpr_timespec deadline,
+                                               void *reserved);
 
 /** Maximum number of outstanding grpc_completion_queue_pluck executions per
     completion queue */
@@ -131,11 +131,11 @@
 
     After calling this function applications should ensure that no
     NEW work is added to be published on this completion queue. */
-GRPC_API void grpc_completion_queue_shutdown(grpc_completion_queue *cq);
+GRPCAPI void grpc_completion_queue_shutdown(grpc_completion_queue *cq);
 
 /** Destroy a completion queue. The caller must ensure that the queue is
     drained and no threads are executing grpc_completion_queue_next */
-GRPC_API void grpc_completion_queue_destroy(grpc_completion_queue *cq);
+GRPCAPI void grpc_completion_queue_destroy(grpc_completion_queue *cq);
 
 /** Create a completion queue alarm instance associated to \a cq.
  *
@@ -143,18 +143,18 @@
  * grpc_alarm_cancel), an event with tag \a tag will be added to \a cq. If the
  * alarm expired, the event's success bit will be true, false otherwise (ie,
  * upon cancellation). */
-GRPC_API grpc_alarm *grpc_alarm_create(grpc_completion_queue *cq,
-                                       gpr_timespec deadline, void *tag);
+GRPCAPI grpc_alarm *grpc_alarm_create(grpc_completion_queue *cq,
+                                      gpr_timespec deadline, void *tag);
 
 /** Cancel a completion queue alarm. Calling this function over an alarm that
  * has already fired has no effect. */
-GRPC_API void grpc_alarm_cancel(grpc_alarm *alarm);
+GRPCAPI void grpc_alarm_cancel(grpc_alarm *alarm);
 
 /** Destroy the given completion queue alarm, cancelling it in the process. */
-GRPC_API void grpc_alarm_destroy(grpc_alarm *alarm);
+GRPCAPI void grpc_alarm_destroy(grpc_alarm *alarm);
 
 /** Check the connectivity state of a channel. */
-GRPC_API grpc_connectivity_state
+GRPCAPI grpc_connectivity_state
 grpc_channel_check_connectivity_state(grpc_channel *channel,
                                       int try_to_connect);
 
@@ -163,7 +163,7 @@
     tag will be enqueued on cq with success=1.
     If deadline expires BEFORE the state is changed, tag will be enqueued on cq
     with success=0. */
-GRPC_API void grpc_channel_watch_connectivity_state(
+GRPCAPI void grpc_channel_watch_connectivity_state(
     grpc_channel *channel, grpc_connectivity_state last_observed_state,
     gpr_timespec deadline, grpc_completion_queue *cq, void *tag);
 
@@ -173,24 +173,23 @@
     If parent_call is non-NULL, it must be a server-side call. It will be used
     to propagate properties from the server call to this new client call.
     */
-GRPC_API grpc_call *grpc_channel_create_call(
+GRPCAPI grpc_call *grpc_channel_create_call(
     grpc_channel *channel, grpc_call *parent_call, uint32_t propagation_mask,
     grpc_completion_queue *completion_queue, const char *method,
     const char *host, gpr_timespec deadline, void *reserved);
 
 /** Ping the channels peer (load balanced channels will select one sub-channel
     to ping); if the channel is not connected, posts a failed. */
-GRPC_API void grpc_channel_ping(grpc_channel *channel,
-                                grpc_completion_queue *cq, void *tag,
-                                void *reserved);
+GRPCAPI void grpc_channel_ping(grpc_channel *channel, grpc_completion_queue *cq,
+                               void *tag, void *reserved);
 
 /** Pre-register a method/host pair on a channel. */
-GRPC_API void *grpc_channel_register_call(grpc_channel *channel,
-                                          const char *method, const char *host,
-                                          void *reserved);
+GRPCAPI void *grpc_channel_register_call(grpc_channel *channel,
+                                         const char *method, const char *host,
+                                         void *reserved);
 
 /** Create a call given a handle returned from grpc_channel_register_call */
-GRPC_API grpc_call *grpc_channel_create_registered_call(
+GRPCAPI grpc_call *grpc_channel_create_registered_call(
     grpc_channel *channel, grpc_call *parent_call, uint32_t propagation_mask,
     grpc_completion_queue *completion_queue, void *registered_call_handle,
     gpr_timespec deadline, void *reserved);
@@ -206,9 +205,9 @@
     needs to be synchronized. As an optimization, you may synchronize batches
     containing just send operations independently from batches containing just
     receive operations. */
-GRPC_API grpc_call_error grpc_call_start_batch(grpc_call *call,
-                                               const grpc_op *ops, size_t nops,
-                                               void *tag, void *reserved);
+GRPCAPI grpc_call_error grpc_call_start_batch(grpc_call *call,
+                                              const grpc_op *ops, size_t nops,
+                                              void *tag, void *reserved);
 
 /** Returns a newly allocated string representing the endpoint to which this
     call is communicating with. The string is in the uri format accepted by
@@ -218,36 +217,36 @@
     WARNING: this value is never authenticated or subject to any security
     related code. It must not be used for any authentication related
     functionality. Instead, use grpc_auth_context. */
-GRPC_API char *grpc_call_get_peer(grpc_call *call);
+GRPCAPI char *grpc_call_get_peer(grpc_call *call);
 
 struct census_context;
 
 /* Set census context for a call; Must be called before first call to
    grpc_call_start_batch(). */
-GRPC_API void grpc_census_call_set_context(grpc_call *call,
-                                           struct census_context *context);
+GRPCAPI void grpc_census_call_set_context(grpc_call *call,
+                                          struct census_context *context);
 
 /* Retrieve the calls current census context. */
-GRPC_API struct census_context *grpc_census_call_get_context(grpc_call *call);
+GRPCAPI struct census_context *grpc_census_call_get_context(grpc_call *call);
 
 /** Return a newly allocated string representing the target a channel was
     created for. */
-GRPC_API char *grpc_channel_get_target(grpc_channel *channel);
+GRPCAPI char *grpc_channel_get_target(grpc_channel *channel);
 
 /** Create a client channel to 'target'. Additional channel level configuration
     MAY be provided by grpc_channel_args, though the expectation is that most
     clients will want to simply pass NULL. See grpc_channel_args definition for
     more on this. The data in 'args' need only live through the invocation of
     this function. */
-GRPC_API grpc_channel *grpc_insecure_channel_create(
+GRPCAPI grpc_channel *grpc_insecure_channel_create(
     const char *target, const grpc_channel_args *args, void *reserved);
 
 /** Create a lame client: this client fails every operation attempted on it. */
-GRPC_API grpc_channel *grpc_lame_client_channel_create(
+GRPCAPI grpc_channel *grpc_lame_client_channel_create(
     const char *target, grpc_status_code error_code, const char *error_message);
 
 /** Close and destroy a grpc channel */
-GRPC_API void grpc_channel_destroy(grpc_channel *channel);
+GRPCAPI void grpc_channel_destroy(grpc_channel *channel);
 
 /* Error handling for grpc_call
    Most grpc_call functions return a grpc_error. If the error is not GRPC_OK
@@ -260,7 +259,7 @@
     THREAD-SAFETY grpc_call_cancel and grpc_call_cancel_with_status
     are thread-safe, and can be called at any point before grpc_call_destroy
     is called.*/
-GRPC_API grpc_call_error grpc_call_cancel(grpc_call *call, void *reserved);
+GRPCAPI grpc_call_error grpc_call_cancel(grpc_call *call, void *reserved);
 
 /** Called by clients to cancel an RPC on the server.
     Can be called multiple times, from any thread.
@@ -268,13 +267,13 @@
     and description passed in.
     Importantly, this function does not send status nor description to the
     remote endpoint. */
-GRPC_API grpc_call_error
+GRPCAPI grpc_call_error
 grpc_call_cancel_with_status(grpc_call *call, grpc_status_code status,
                              const char *description, void *reserved);
 
 /** Destroy a call.
     THREAD SAFETY: grpc_call_destroy is thread-compatible */
-GRPC_API void grpc_call_destroy(grpc_call *call);
+GRPCAPI void grpc_call_destroy(grpc_call *call);
 
 /** Request notification of a new call.
     Once a call is received, a notification tagged with \a tag_new is added to
@@ -284,7 +283,7 @@
     to \a cq_bound_to_call.
     Note that \a cq_for_notification must have been registered to the server via
     \a grpc_server_register_completion_queue. */
-GRPC_API grpc_call_error
+GRPCAPI grpc_call_error
 grpc_server_request_call(grpc_server *server, grpc_call **call,
                          grpc_call_details *details,
                          grpc_metadata_array *request_metadata,
@@ -299,14 +298,13 @@
     registered_method (as returned by this function).
     Must be called before grpc_server_start.
     Returns NULL on failure. */
-GRPC_API void *grpc_server_register_method(grpc_server *server,
-                                           const char *method,
-                                           const char *host);
+GRPCAPI void *grpc_server_register_method(grpc_server *server,
+                                          const char *method, const char *host);
 
 /** Request notification of a new pre-registered call. 'cq_for_notification'
     must have been registered to the server via
     grpc_server_register_completion_queue. */
-GRPC_API grpc_call_error grpc_server_request_registered_call(
+GRPCAPI grpc_call_error grpc_server_request_registered_call(
     grpc_server *server, void *registered_method, grpc_call **call,
     gpr_timespec *deadline, grpc_metadata_array *request_metadata,
     grpc_byte_buffer **optional_payload,
@@ -317,25 +315,25 @@
     be specified with args. If no additional configuration is needed, args can
     be NULL. See grpc_channel_args for more. The data in 'args' need only live
     through the invocation of this function. */
-GRPC_API grpc_server *grpc_server_create(const grpc_channel_args *args,
-                                         void *reserved);
+GRPCAPI grpc_server *grpc_server_create(const grpc_channel_args *args,
+                                        void *reserved);
 
 /** Register a completion queue with the server. Must be done for any
     notification completion queue that is passed to grpc_server_request_*_call
     and to grpc_server_shutdown_and_notify. Must be performed prior to
     grpc_server_start. */
-GRPC_API void grpc_server_register_completion_queue(grpc_server *server,
-                                                    grpc_completion_queue *cq,
-                                                    void *reserved);
+GRPCAPI void grpc_server_register_completion_queue(grpc_server *server,
+                                                   grpc_completion_queue *cq,
+                                                   void *reserved);
 
 /** Add a HTTP2 over plaintext over tcp listener.
     Returns bound port number on success, 0 on failure.
     REQUIRES: server not started */
-GRPC_API int grpc_server_add_insecure_http2_port(grpc_server *server,
-                                                 const char *addr);
+GRPCAPI int grpc_server_add_insecure_http2_port(grpc_server *server,
+                                                const char *addr);
 
 /** Start a server - tells all listeners to start listening */
-GRPC_API void grpc_server_start(grpc_server *server);
+GRPCAPI void grpc_server_start(grpc_server *server);
 
 /** Begin shutting down a server.
     After completion, no new calls or connections will be admitted.
@@ -344,19 +342,19 @@
     Shutdown is idempotent, and all tags will be notified at once if multiple
     grpc_server_shutdown_and_notify calls are made. 'cq' must have been
     registered to this server via grpc_server_register_completion_queue. */
-GRPC_API void grpc_server_shutdown_and_notify(grpc_server *server,
-                                              grpc_completion_queue *cq,
-                                              void *tag);
+GRPCAPI void grpc_server_shutdown_and_notify(grpc_server *server,
+                                             grpc_completion_queue *cq,
+                                             void *tag);
 
 /** Cancel all in-progress calls.
     Only usable after shutdown. */
-GRPC_API void grpc_server_cancel_all_calls(grpc_server *server);
+GRPCAPI void grpc_server_cancel_all_calls(grpc_server *server);
 
 /** Destroy a server.
     Shutdown must have completed beforehand (i.e. all tags generated by
     grpc_server_shutdown_and_notify must have been received, and at least
     one call to grpc_server_shutdown_and_notify must have been made). */
-GRPC_API void grpc_server_destroy(grpc_server *server);
+GRPCAPI void grpc_server_destroy(grpc_server *server);
 
 /** Enable or disable a tracer.
 
@@ -366,18 +364,17 @@
 
     Use of this function is not strictly thread-safe, but the
     thread-safety issues raised by it should not be of concern. */
-GRPC_API int grpc_tracer_set_enabled(const char *name, int enabled);
+GRPCAPI int grpc_tracer_set_enabled(const char *name, int enabled);
 
 /** Check whether a metadata key is legal (will be accepted by core) */
-GRPC_API int grpc_header_key_is_legal(const char *key, size_t length);
+GRPCAPI int grpc_header_key_is_legal(const char *key, size_t length);
 
 /** Check whether a non-binary metadata value is legal (will be accepted by
     core) */
-GRPC_API int grpc_header_nonbin_value_is_legal(const char *value,
-                                               size_t length);
+GRPCAPI int grpc_header_nonbin_value_is_legal(const char *value, size_t length);
 
 /** Check whether a metadata key corresponds to a binary value */
-GRPC_API int grpc_is_binary_header(const char *key, size_t length);
+GRPCAPI int grpc_is_binary_header(const char *key, size_t length);
 
 #ifdef __cplusplus
 }
diff --git a/include/grpc/grpc_security.h b/include/grpc/grpc_security.h
index 28881c3..3de5cae 100644
--- a/include/grpc/grpc_security.h
+++ b/include/grpc/grpc_security.h
@@ -65,39 +65,39 @@
 } grpc_auth_property;
 
 /* Returns NULL when the iterator is at the end. */
-GRPC_API const grpc_auth_property *grpc_auth_property_iterator_next(
+GRPCAPI const grpc_auth_property *grpc_auth_property_iterator_next(
     grpc_auth_property_iterator *it);
 
 /* Iterates over the auth context. */
-GRPC_API grpc_auth_property_iterator
+GRPCAPI grpc_auth_property_iterator
 grpc_auth_context_property_iterator(const grpc_auth_context *ctx);
 
 /* Gets the peer identity. Returns an empty iterator (first _next will return
    NULL) if the peer is not authenticated. */
-GRPC_API grpc_auth_property_iterator
+GRPCAPI grpc_auth_property_iterator
 grpc_auth_context_peer_identity(const grpc_auth_context *ctx);
 
 /* Finds a property in the context. May return an empty iterator (first _next
    will return NULL) if no property with this name was found in the context. */
-GRPC_API grpc_auth_property_iterator
+GRPCAPI grpc_auth_property_iterator
 grpc_auth_context_find_properties_by_name(const grpc_auth_context *ctx,
                                           const char *name);
 
 /* Gets the name of the property that indicates the peer identity. Will return
    NULL if the peer is not authenticated. */
-GRPC_API const char *grpc_auth_context_peer_identity_property_name(
+GRPCAPI const char *grpc_auth_context_peer_identity_property_name(
     const grpc_auth_context *ctx);
 
 /* Returns 1 if the peer is authenticated, 0 otherwise. */
-GRPC_API int grpc_auth_context_peer_is_authenticated(
+GRPCAPI int grpc_auth_context_peer_is_authenticated(
     const grpc_auth_context *ctx);
 
 /* Gets the auth context from the call. Caller needs to call
    grpc_auth_context_release on the returned context. */
-GRPC_API grpc_auth_context *grpc_call_auth_context(grpc_call *call);
+GRPCAPI grpc_auth_context *grpc_call_auth_context(grpc_call *call);
 
 /* Releases the auth context returned from grpc_call_auth_context. */
-GRPC_API void grpc_auth_context_release(grpc_auth_context *context);
+GRPCAPI void grpc_auth_context_release(grpc_auth_context *context);
 
 /* --
    The following auth context methods should only be called by a server metadata
@@ -105,19 +105,18 @@
    -- */
 
 /* Add a property. */
-GRPC_API void grpc_auth_context_add_property(grpc_auth_context *ctx,
-                                             const char *name,
-                                             const char *value,
-                                             size_t value_length);
+GRPCAPI void grpc_auth_context_add_property(grpc_auth_context *ctx,
+                                            const char *name, const char *value,
+                                            size_t value_length);
 
 /* Add a C string property. */
-GRPC_API void grpc_auth_context_add_cstring_property(grpc_auth_context *ctx,
-                                                     const char *name,
-                                                     const char *value);
+GRPCAPI void grpc_auth_context_add_cstring_property(grpc_auth_context *ctx,
+                                                    const char *name,
+                                                    const char *value);
 
 /* Sets the property name. Returns 1 if successful or 0 in case of failure
    (which means that no property with this name exists). */
-GRPC_API int grpc_auth_context_set_peer_identity_property_name(
+GRPCAPI int grpc_auth_context_set_peer_identity_property_name(
     grpc_auth_context *ctx, const char *name);
 
 /* --- grpc_channel_credentials object. ---
@@ -129,7 +128,7 @@
 
 /* Releases a channel credentials object.
    The creator of the credentials object is responsible for its release. */
-GRPC_API void grpc_channel_credentials_release(grpc_channel_credentials *creds);
+GRPCAPI void grpc_channel_credentials_release(grpc_channel_credentials *creds);
 
 /* Environment variable that points to the google default application
    credentials json key or refresh token. Used in the
@@ -139,7 +138,7 @@
 /* Creates default credentials to connect to a google gRPC service.
    WARNING: Do NOT use this credentials to connect to a non-google service as
    this could result in an oauth2 token leak. */
-GRPC_API grpc_channel_credentials *grpc_google_default_credentials_create(void);
+GRPCAPI grpc_channel_credentials *grpc_google_default_credentials_create(void);
 
 /* Environment variable that points to the default SSL roots file. This file
    must be a PEM encoded file with all the roots such as the one that can be
@@ -192,7 +191,7 @@
    - pem_key_cert_pair is a pointer on the object containing client's private
      key and certificate chain. This parameter can be NULL if the client does
      not have such a key/cert pair. */
-GRPC_API grpc_channel_credentials *grpc_ssl_credentials_create(
+GRPCAPI grpc_channel_credentials *grpc_ssl_credentials_create(
     const char *pem_root_certs, grpc_ssl_pem_key_cert_pair *pem_key_cert_pair,
     void *reserved);
 
@@ -206,32 +205,32 @@
 
 /* Releases a call credentials object.
    The creator of the credentials object is responsible for its release. */
-GRPC_API void grpc_call_credentials_release(grpc_call_credentials *creds);
+GRPCAPI void grpc_call_credentials_release(grpc_call_credentials *creds);
 
 /* Creates a composite channel credentials object. */
-GRPC_API grpc_channel_credentials *grpc_composite_channel_credentials_create(
+GRPCAPI grpc_channel_credentials *grpc_composite_channel_credentials_create(
     grpc_channel_credentials *channel_creds, grpc_call_credentials *call_creds,
     void *reserved);
 
 /* Creates a composite call credentials object. */
-GRPC_API grpc_call_credentials *grpc_composite_call_credentials_create(
+GRPCAPI grpc_call_credentials *grpc_composite_call_credentials_create(
     grpc_call_credentials *creds1, grpc_call_credentials *creds2,
     void *reserved);
 
 /* Creates a compute engine credentials object for connecting to Google.
    WARNING: Do NOT use this credentials to connect to a non-google service as
    this could result in an oauth2 token leak. */
-GRPC_API grpc_call_credentials *grpc_google_compute_engine_credentials_create(
+GRPCAPI grpc_call_credentials *grpc_google_compute_engine_credentials_create(
     void *reserved);
 
-GRPC_API gpr_timespec grpc_max_auth_token_lifetime();
+GRPCAPI gpr_timespec grpc_max_auth_token_lifetime();
 
 /* Creates a JWT credentials object. May return NULL if the input is invalid.
    - json_key is the JSON key string containing the client's private key.
    - token_lifetime is the lifetime of each Json Web Token (JWT) created with
      this credentials.  It should not exceed grpc_max_auth_token_lifetime or
      will be cropped to this value.  */
-GRPC_API grpc_call_credentials *
+GRPCAPI grpc_call_credentials *
 grpc_service_account_jwt_access_credentials_create(const char *json_key,
                                                    gpr_timespec token_lifetime,
                                                    void *reserved);
@@ -242,16 +241,16 @@
    this could result in an oauth2 token leak.
    - json_refresh_token is the JSON string containing the refresh token itself
      along with a client_id and client_secret. */
-GRPC_API grpc_call_credentials *grpc_google_refresh_token_credentials_create(
+GRPCAPI grpc_call_credentials *grpc_google_refresh_token_credentials_create(
     const char *json_refresh_token, void *reserved);
 
 /* Creates an Oauth2 Access Token credentials with an access token that was
    aquired by an out of band mechanism. */
-GRPC_API grpc_call_credentials *grpc_access_token_credentials_create(
+GRPCAPI grpc_call_credentials *grpc_access_token_credentials_create(
     const char *access_token, void *reserved);
 
 /* Creates an IAM credentials object for connecting to Google. */
-GRPC_API grpc_call_credentials *grpc_google_iam_credentials_create(
+GRPCAPI grpc_call_credentials *grpc_google_iam_credentials_create(
     const char *authorization_token, const char *authority_selector,
     void *reserved);
 
@@ -313,13 +312,13 @@
 } grpc_metadata_credentials_plugin;
 
 /* Creates a credentials object from a plugin. */
-GRPC_API grpc_call_credentials *grpc_metadata_credentials_create_from_plugin(
+GRPCAPI grpc_call_credentials *grpc_metadata_credentials_create_from_plugin(
     grpc_metadata_credentials_plugin plugin, void *reserved);
 
 /* --- Secure channel creation. --- */
 
 /* Creates a secure channel using the passed-in credentials. */
-GRPC_API grpc_channel *grpc_secure_channel_create(
+GRPCAPI grpc_channel *grpc_secure_channel_create(
     grpc_channel_credentials *creds, const char *target,
     const grpc_channel_args *args, void *reserved);
 
@@ -332,7 +331,7 @@
 /* Releases a server_credentials object.
    The creator of the server_credentials object is responsible for its release.
    */
-GRPC_API void grpc_server_credentials_release(grpc_server_credentials *creds);
+GRPCAPI void grpc_server_credentials_release(grpc_server_credentials *creds);
 
 /* Creates an SSL server_credentials object.
    - pem_roots_cert is the NULL-terminated string containing the PEM encoding of
@@ -345,7 +344,7 @@
    - force_client_auth, if set to non-zero will force the client to authenticate
      with an SSL cert. Note that this option is ignored if pem_root_certs is
      NULL. */
-GRPC_API grpc_server_credentials *grpc_ssl_server_credentials_create(
+GRPCAPI grpc_server_credentials *grpc_ssl_server_credentials_create(
     const char *pem_root_certs, grpc_ssl_pem_key_cert_pair *pem_key_cert_pairs,
     size_t num_key_cert_pairs, int force_client_auth, void *reserved);
 
@@ -354,15 +353,15 @@
 /* Add a HTTP2 over an encrypted link over tcp listener.
    Returns bound port number on success, 0 on failure.
    REQUIRES: server not started */
-GRPC_API int grpc_server_add_secure_http2_port(grpc_server *server,
-                                               const char *addr,
-                                               grpc_server_credentials *creds);
+GRPCAPI int grpc_server_add_secure_http2_port(grpc_server *server,
+                                              const char *addr,
+                                              grpc_server_credentials *creds);
 
 /* --- Call specific credentials. --- */
 
 /* Sets a credentials to a call. Can only be called on the client side before
    grpc_call_start_batch. */
-GRPC_API grpc_call_error
+GRPCAPI grpc_call_error
 grpc_call_set_credentials(grpc_call *call, grpc_call_credentials *creds);
 
 /* --- Auth Metadata Processing --- */
@@ -394,7 +393,7 @@
   void *state;
 } grpc_auth_metadata_processor;
 
-GRPC_API void grpc_server_credentials_set_auth_metadata_processor(
+GRPCAPI void grpc_server_credentials_set_auth_metadata_processor(
     grpc_server_credentials *creds, grpc_auth_metadata_processor processor);
 
 #ifdef __cplusplus
diff --git a/include/grpc/impl/codegen/alloc.h b/include/grpc/impl/codegen/alloc.h
index dc7ba78..2351354 100644
--- a/include/grpc/impl/codegen/alloc.h
+++ b/include/grpc/impl/codegen/alloc.h
@@ -49,23 +49,23 @@
 } gpr_allocation_functions;
 
 /* malloc, never returns NULL */
-GPR_API void *gpr_malloc(size_t size);
+GPRAPI void *gpr_malloc(size_t size);
 /* free */
-GPR_API void gpr_free(void *ptr);
+GPRAPI void gpr_free(void *ptr);
 /* realloc, never returns NULL */
-GPR_API void *gpr_realloc(void *p, size_t size);
+GPRAPI void *gpr_realloc(void *p, size_t size);
 /* aligned malloc, never returns NULL, will align to 1 << alignment_log */
-GPR_API void *gpr_malloc_aligned(size_t size, size_t alignment_log);
+GPRAPI void *gpr_malloc_aligned(size_t size, size_t alignment_log);
 /* free memory allocated by gpr_malloc_aligned */
-GPR_API void gpr_free_aligned(void *ptr);
+GPRAPI void gpr_free_aligned(void *ptr);
 
 /** Request the family of allocation functions in \a functions be used. NOTE
  * that this request will be honored in a *best effort* basis and that no
  * guarantees are made about the default functions (eg, malloc) being called. */
-GPR_API void gpr_set_allocation_functions(gpr_allocation_functions functions);
+GPRAPI void gpr_set_allocation_functions(gpr_allocation_functions functions);
 
 /** Return the family of allocation functions currently in effect. */
-GPR_API gpr_allocation_functions gpr_get_allocation_functions();
+GPRAPI gpr_allocation_functions gpr_get_allocation_functions();
 
 #ifdef __cplusplus
 }
diff --git a/include/grpc/impl/codegen/byte_buffer.h b/include/grpc/impl/codegen/byte_buffer.h
index 5049461..9e96d4b 100644
--- a/include/grpc/impl/codegen/byte_buffer.h
+++ b/include/grpc/impl/codegen/byte_buffer.h
@@ -65,8 +65,8 @@
  *
  * Increases the reference count for all \a slices processed. The user is
  * responsible for invoking grpc_byte_buffer_destroy on the returned instance.*/
-GRPC_API grpc_byte_buffer *grpc_raw_byte_buffer_create(gpr_slice *slices,
-                                                       size_t nslices);
+GRPCAPI grpc_byte_buffer *grpc_raw_byte_buffer_create(gpr_slice *slices,
+                                                      size_t nslices);
 
 /** Returns a *compressed* RAW byte buffer instance over the given slices (up to
  * \a nslices). The \a compression argument defines the compression algorithm
@@ -74,44 +74,44 @@
  *
  * Increases the reference count for all \a slices processed. The user is
  * responsible for invoking grpc_byte_buffer_destroy on the returned instance.*/
-GRPC_API grpc_byte_buffer *grpc_raw_compressed_byte_buffer_create(
+GRPCAPI grpc_byte_buffer *grpc_raw_compressed_byte_buffer_create(
     gpr_slice *slices, size_t nslices, grpc_compression_algorithm compression);
 
 /** Copies input byte buffer \a bb.
  *
  * Increases the reference count of all the source slices. The user is
  * responsible for calling grpc_byte_buffer_destroy over the returned copy. */
-GRPC_API grpc_byte_buffer *grpc_byte_buffer_copy(grpc_byte_buffer *bb);
+GRPCAPI grpc_byte_buffer *grpc_byte_buffer_copy(grpc_byte_buffer *bb);
 
 /** Returns the size of the given byte buffer, in bytes. */
-GRPC_API size_t grpc_byte_buffer_length(grpc_byte_buffer *bb);
+GRPCAPI size_t grpc_byte_buffer_length(grpc_byte_buffer *bb);
 
 /** Destroys \a byte_buffer deallocating all its memory. */
-GRPC_API void grpc_byte_buffer_destroy(grpc_byte_buffer *byte_buffer);
+GRPCAPI void grpc_byte_buffer_destroy(grpc_byte_buffer *byte_buffer);
 
 /** Reader for byte buffers. Iterates over slices in the byte buffer */
 struct grpc_byte_buffer_reader;
 typedef struct grpc_byte_buffer_reader grpc_byte_buffer_reader;
 
 /** Initialize \a reader to read over \a buffer */
-GRPC_API void grpc_byte_buffer_reader_init(grpc_byte_buffer_reader *reader,
-                                           grpc_byte_buffer *buffer);
+GRPCAPI void grpc_byte_buffer_reader_init(grpc_byte_buffer_reader *reader,
+                                          grpc_byte_buffer *buffer);
 
 /** Cleanup and destroy \a reader */
-GRPC_API void grpc_byte_buffer_reader_destroy(grpc_byte_buffer_reader *reader);
+GRPCAPI void grpc_byte_buffer_reader_destroy(grpc_byte_buffer_reader *reader);
 
 /** Updates \a slice with the next piece of data from from \a reader and returns
  * 1. Returns 0 at the end of the stream. Caller is responsible for calling
  * gpr_slice_unref on the result. */
-GRPC_API int grpc_byte_buffer_reader_next(grpc_byte_buffer_reader *reader,
-                                          gpr_slice *slice);
+GRPCAPI int grpc_byte_buffer_reader_next(grpc_byte_buffer_reader *reader,
+                                         gpr_slice *slice);
 
 /** Merge all data from \a reader into single slice */
-GRPC_API gpr_slice
+GRPCAPI gpr_slice
 grpc_byte_buffer_reader_readall(grpc_byte_buffer_reader *reader);
 
 /** Returns a RAW byte buffer instance from the output of \a reader. */
-GRPC_API grpc_byte_buffer *grpc_raw_byte_buffer_from_reader(
+GRPCAPI grpc_byte_buffer *grpc_raw_byte_buffer_from_reader(
     grpc_byte_buffer_reader *reader);
 
 #ifdef __cplusplus
diff --git a/include/grpc/impl/codegen/log.h b/include/grpc/impl/codegen/log.h
index 5df91c6..d6e18e9 100644
--- a/include/grpc/impl/codegen/log.h
+++ b/include/grpc/impl/codegen/log.h
@@ -71,11 +71,11 @@
 
 /* Log a message. It's advised to use GPR_xxx above to generate the context
  * for each message */
-GPR_API void gpr_log(const char *file, int line, gpr_log_severity severity,
-                     const char *format, ...);
+GPRAPI void gpr_log(const char *file, int line, gpr_log_severity severity,
+                    const char *format, ...);
 
-GPR_API void gpr_log_message(const char *file, int line,
-                             gpr_log_severity severity, const char *message);
+GPRAPI void gpr_log_message(const char *file, int line,
+                            gpr_log_severity severity, const char *message);
 
 /* Log overrides: applications can use this API to intercept logging calls
    and use their own implementations */
@@ -88,7 +88,7 @@
 } gpr_log_func_args;
 
 typedef void (*gpr_log_func)(gpr_log_func_args *args);
-GPR_API void gpr_set_log_function(gpr_log_func func);
+GPRAPI void gpr_set_log_function(gpr_log_func func);
 
 /* abort() the process if x is zero, having written a line to the log.
 
diff --git a/include/grpc/impl/codegen/port_platform.h b/include/grpc/impl/codegen/port_platform.h
index d265e9b..9256904 100644
--- a/include/grpc/impl/codegen/port_platform.h
+++ b/include/grpc/impl/codegen/port_platform.h
@@ -34,6 +34,14 @@
 #ifndef GRPC_IMPL_CODEGEN_PORT_PLATFORM_H
 #define GRPC_IMPL_CODEGEN_PORT_PLATFORM_H
 
+/*
+ * Define GPR_BACKWARDS_COMPATIBILITY_MODE to try harder to be ABI
+ * compatible with older platforms (currently only on Linux)
+ * Causes:
+ *  - some libc calls to be gotten via dlsym
+ *  - some syscalls to be made directly
+ */
+
 /* Get windows.h included everywhere (we need it) */
 #if defined(_WIN64) || defined(WIN64) || defined(_WIN32) || defined(WIN32)
 #ifndef WIN32_LEAN_AND_MEAN
@@ -347,16 +355,16 @@
   } while (0)
 #endif /* GPR_FORBID_UNREACHABLE_CODE */
 
-#ifndef GPR_API
-#define GPR_API
+#ifndef GPRAPI
+#define GPRAPI
 #endif
 
-#ifndef GRPC_API
-#define GRPC_API GPR_API
+#ifndef GRPCAPI
+#define GRPCAPI GPRAPI
 #endif
 
-#ifndef CENSUS_API
-#define CENSUS_API GRPC_API
+#ifndef CENSUSAPI
+#define CENSUSAPI GRPCAPI
 #endif
 
 #endif /* GRPC_IMPL_CODEGEN_PORT_PLATFORM_H */
diff --git a/include/grpc/impl/codegen/slice.h b/include/grpc/impl/codegen/slice.h
index d60a40c..a62fdd0 100644
--- a/include/grpc/impl/codegen/slice.h
+++ b/include/grpc/impl/codegen/slice.h
@@ -105,7 +105,7 @@
 
 /* Increment the refcount of s. Requires slice is initialized.
    Returns s. */
-GPR_API gpr_slice gpr_slice_ref(gpr_slice s);
+GPRAPI gpr_slice gpr_slice_ref(gpr_slice s);
 
 /* Decrement the ref count of s.  If the ref count of s reaches zero, all
    slices sharing the ref count are destroyed, and considered no longer
@@ -113,22 +113,22 @@
    len, dest) where dest!=NULL , then (*dest)(start) is called, else if s is
    ultimately derived from a call to gpr_slice_new_with_len(start, len, dest)
    where dest!=NULL , then (*dest)(start, len).  Requires s initialized.  */
-GPR_API void gpr_slice_unref(gpr_slice s);
+GPRAPI void gpr_slice_unref(gpr_slice s);
 
 /* Create a slice pointing at some data. Calls malloc to allocate a refcount
    for the object, and arranges that destroy will be called with the pointer
    passed in at destruction. */
-GPR_API gpr_slice gpr_slice_new(void *p, size_t len, void (*destroy)(void *));
+GPRAPI gpr_slice gpr_slice_new(void *p, size_t len, void (*destroy)(void *));
 
 /* Equivalent to gpr_slice_new, but with a two argument destroy function that
    also takes the slice length. */
-GPR_API gpr_slice
+GPRAPI gpr_slice
 gpr_slice_new_with_len(void *p, size_t len, void (*destroy)(void *, size_t));
 
 /* Equivalent to gpr_slice_new(malloc(len), len, free), but saves one malloc()
    call.
    Aborts if malloc() fails. */
-GPR_API gpr_slice gpr_slice_malloc(size_t length);
+GPRAPI gpr_slice gpr_slice_malloc(size_t length);
 
 /* Create a slice by copying a string.
    Does not preserve null terminators.
@@ -136,44 +136,44 @@
      size_t len = strlen(source);
      gpr_slice slice = gpr_slice_malloc(len);
      memcpy(slice->data, source, len); */
-GPR_API gpr_slice gpr_slice_from_copied_string(const char *source);
+GPRAPI gpr_slice gpr_slice_from_copied_string(const char *source);
 
 /* Create a slice by copying a buffer.
    Equivalent to:
      gpr_slice slice = gpr_slice_malloc(len);
      memcpy(slice->data, source, len); */
-GPR_API gpr_slice gpr_slice_from_copied_buffer(const char *source, size_t len);
+GPRAPI gpr_slice gpr_slice_from_copied_buffer(const char *source, size_t len);
 
 /* Create a slice pointing to constant memory */
-GPR_API gpr_slice gpr_slice_from_static_string(const char *source);
+GPRAPI gpr_slice gpr_slice_from_static_string(const char *source);
 
 /* Return a result slice derived from s, which shares a ref count with s, where
    result.data==s.data+begin, and result.length==end-begin.
    The ref count of s is increased by one.
    Requires s initialized, begin <= end, begin <= s.length, and
    end <= source->length. */
-GPR_API gpr_slice gpr_slice_sub(gpr_slice s, size_t begin, size_t end);
+GPRAPI gpr_slice gpr_slice_sub(gpr_slice s, size_t begin, size_t end);
 
 /* The same as gpr_slice_sub, but without altering the ref count */
-GPR_API gpr_slice gpr_slice_sub_no_ref(gpr_slice s, size_t begin, size_t end);
+GPRAPI gpr_slice gpr_slice_sub_no_ref(gpr_slice s, size_t begin, size_t end);
 
 /* Splits s into two: modifies s to be s[0:split], and returns a new slice,
    sharing a refcount with s, that contains s[split:s.length].
    Requires s intialized, split <= s.length */
-GPR_API gpr_slice gpr_slice_split_tail(gpr_slice *s, size_t split);
+GPRAPI gpr_slice gpr_slice_split_tail(gpr_slice *s, size_t split);
 
 /* Splits s into two: modifies s to be s[split:s.length], and returns a new
    slice, sharing a refcount with s, that contains s[0:split].
    Requires s intialized, split <= s.length */
-GPR_API gpr_slice gpr_slice_split_head(gpr_slice *s, size_t split);
+GPRAPI gpr_slice gpr_slice_split_head(gpr_slice *s, size_t split);
 
-GPR_API gpr_slice gpr_empty_slice(void);
+GPRAPI gpr_slice gpr_empty_slice(void);
 
 /* Returns <0 if a < b, ==0 if a == b, >0 if a > b
    The order is arbitrary, and is not guaranteed to be stable across different
    versions of the API. */
-GPR_API int gpr_slice_cmp(gpr_slice a, gpr_slice b);
-GPR_API int gpr_slice_str_cmp(gpr_slice a, const char *b);
+GPRAPI int gpr_slice_cmp(gpr_slice a, gpr_slice b);
+GPRAPI int gpr_slice_str_cmp(gpr_slice a, const char *b);
 
 #ifdef __cplusplus
 }
diff --git a/include/grpc/impl/codegen/slice_buffer.h b/include/grpc/impl/codegen/slice_buffer.h
index 8428c2f..4fe909e 100644
--- a/include/grpc/impl/codegen/slice_buffer.h
+++ b/include/grpc/impl/codegen/slice_buffer.h
@@ -59,13 +59,13 @@
 } gpr_slice_buffer;
 
 /* initialize a slice buffer */
-GPR_API void gpr_slice_buffer_init(gpr_slice_buffer *sb);
+GPRAPI void gpr_slice_buffer_init(gpr_slice_buffer *sb);
 /* destroy a slice buffer - unrefs any held elements */
-GPR_API void gpr_slice_buffer_destroy(gpr_slice_buffer *sb);
+GPRAPI void gpr_slice_buffer_destroy(gpr_slice_buffer *sb);
 /* Add an element to a slice buffer - takes ownership of the slice.
    This function is allowed to concatenate the passed in slice to the end of
    some other slice if desired by the slice buffer. */
-GPR_API void gpr_slice_buffer_add(gpr_slice_buffer *sb, gpr_slice slice);
+GPRAPI void gpr_slice_buffer_add(gpr_slice_buffer *sb, gpr_slice slice);
 /* add an element to a slice buffer - takes ownership of the slice and returns
    the index of the slice.
    Guarantees that the slice will not be concatenated at the end of another
@@ -73,30 +73,30 @@
    slice at the returned index in sb->slices)
    The implementation MAY decide to concatenate data at the end of a small
    slice added in this fashion. */
-GPR_API size_t
+GPRAPI size_t
 gpr_slice_buffer_add_indexed(gpr_slice_buffer *sb, gpr_slice slice);
-GPR_API void gpr_slice_buffer_addn(gpr_slice_buffer *sb, gpr_slice *slices,
-                                   size_t n);
+GPRAPI void gpr_slice_buffer_addn(gpr_slice_buffer *sb, gpr_slice *slices,
+                                  size_t n);
 /* add a very small (less than 8 bytes) amount of data to the end of a slice
    buffer: returns a pointer into which to add the data */
-GPR_API uint8_t *gpr_slice_buffer_tiny_add(gpr_slice_buffer *sb, size_t len);
+GPRAPI uint8_t *gpr_slice_buffer_tiny_add(gpr_slice_buffer *sb, size_t len);
 /* pop the last buffer, but don't unref it */
-GPR_API void gpr_slice_buffer_pop(gpr_slice_buffer *sb);
+GPRAPI void gpr_slice_buffer_pop(gpr_slice_buffer *sb);
 /* clear a slice buffer, unref all elements */
-GPR_API void gpr_slice_buffer_reset_and_unref(gpr_slice_buffer *sb);
+GPRAPI void gpr_slice_buffer_reset_and_unref(gpr_slice_buffer *sb);
 /* swap the contents of two slice buffers */
-GPR_API void gpr_slice_buffer_swap(gpr_slice_buffer *a, gpr_slice_buffer *b);
+GPRAPI void gpr_slice_buffer_swap(gpr_slice_buffer *a, gpr_slice_buffer *b);
 /* move all of the elements of src into dst */
-GPR_API void gpr_slice_buffer_move_into(gpr_slice_buffer *src,
-                                        gpr_slice_buffer *dst);
+GPRAPI void gpr_slice_buffer_move_into(gpr_slice_buffer *src,
+                                       gpr_slice_buffer *dst);
 /* remove n bytes from the end of a slice buffer */
-GPR_API void gpr_slice_buffer_trim_end(gpr_slice_buffer *src, size_t n,
-                                       gpr_slice_buffer *garbage);
+GPRAPI void gpr_slice_buffer_trim_end(gpr_slice_buffer *src, size_t n,
+                                      gpr_slice_buffer *garbage);
 /* move the first n bytes of src into dst */
-GPR_API void gpr_slice_buffer_move_first(gpr_slice_buffer *src, size_t n,
-                                         gpr_slice_buffer *dst);
+GPRAPI void gpr_slice_buffer_move_first(gpr_slice_buffer *src, size_t n,
+                                        gpr_slice_buffer *dst);
 /* take the first slice in the slice buffer */
-GPR_API gpr_slice gpr_slice_buffer_take_first(gpr_slice_buffer *src);
+GPRAPI gpr_slice gpr_slice_buffer_take_first(gpr_slice_buffer *src);
 
 #ifdef __cplusplus
 }
diff --git a/include/grpc/impl/codegen/sync.h b/include/grpc/impl/codegen/sync.h
index 04ff0dc..d2f19d3 100644
--- a/include/grpc/impl/codegen/sync.h
+++ b/include/grpc/impl/codegen/sync.h
@@ -78,26 +78,26 @@
    gpr_mu are uninitialized when first declared.  */
 
 /* Initialize *mu.  Requires:  *mu uninitialized.  */
-GPR_API void gpr_mu_init(gpr_mu *mu);
+GPRAPI void gpr_mu_init(gpr_mu *mu);
 
 /* Cause *mu no longer to be initialized, freeing any memory in use.  Requires:
    *mu initialized; no other concurrent operation on *mu.  */
-GPR_API void gpr_mu_destroy(gpr_mu *mu);
+GPRAPI void gpr_mu_destroy(gpr_mu *mu);
 
 /* Wait until no thread has a lock on *mu, cause the calling thread to own an
    exclusive lock on *mu, then return.  May block indefinitely or crash if the
    calling thread has a lock on *mu.  Requires:  *mu initialized.  */
-GPR_API void gpr_mu_lock(gpr_mu *mu);
+GPRAPI void gpr_mu_lock(gpr_mu *mu);
 
 /* Release an exclusive lock on *mu held by the calling thread.  Requires:  *mu
    initialized; the calling thread holds an exclusive lock on *mu.  */
-GPR_API void gpr_mu_unlock(gpr_mu *mu);
+GPRAPI void gpr_mu_unlock(gpr_mu *mu);
 
 /* Without blocking, attempt to acquire an exclusive lock on *mu for the
    calling thread, then return non-zero iff success.  Fail, if any thread holds
    the lock; succeeds with high probability if no thread holds the lock.
    Requires:  *mu initialized.  */
-GPR_API int gpr_mu_trylock(gpr_mu *mu);
+GPRAPI int gpr_mu_trylock(gpr_mu *mu);
 
 /* --- Condition variable interface ---
 
@@ -106,11 +106,11 @@
    uninitialized when first declared.  */
 
 /* Initialize *cv.  Requires:  *cv uninitialized.  */
-GPR_API void gpr_cv_init(gpr_cv *cv);
+GPRAPI void gpr_cv_init(gpr_cv *cv);
 
 /* Cause *cv no longer to be initialized, freeing any memory in use.  Requires:
    *cv initialized; no other concurrent operation on *cv.*/
-GPR_API void gpr_cv_destroy(gpr_cv *cv);
+GPRAPI void gpr_cv_destroy(gpr_cv *cv);
 
 /* Atomically release *mu and wait on *cv.  When the calling thread is woken
    from *cv or the deadline abs_deadline is exceeded, execute gpr_mu_lock(mu)
@@ -119,16 +119,16 @@
    an absolute deadline, or a GPR_TIMESPAN.  May return even when not
    woken explicitly.  Requires:  *mu and *cv initialized; the calling thread
    holds an exclusive lock on *mu.  */
-GPR_API int gpr_cv_wait(gpr_cv *cv, gpr_mu *mu, gpr_timespec abs_deadline);
+GPRAPI int gpr_cv_wait(gpr_cv *cv, gpr_mu *mu, gpr_timespec abs_deadline);
 
 /* If any threads are waiting on *cv, wake at least one.
    Clients may treat this as an optimization of gpr_cv_broadcast()
    for use in the case where waking more than one waiter is not useful.
    Requires:  *cv initialized.  */
-GPR_API void gpr_cv_signal(gpr_cv *cv);
+GPRAPI void gpr_cv_signal(gpr_cv *cv);
 
 /* Wake all threads waiting on *cv.  Requires:  *cv initialized.  */
-GPR_API void gpr_cv_broadcast(gpr_cv *cv);
+GPRAPI void gpr_cv_broadcast(gpr_cv *cv);
 
 /* --- One-time initialization ---
 
@@ -141,7 +141,7 @@
    If multiple threads call gpr_once() on the same gpr_once instance, one of
    them will call (*init_routine)(), and the others will block until that call
    finishes.*/
-GPR_API void gpr_once_init(gpr_once *once, void (*init_routine)(void));
+GPRAPI void gpr_once_init(gpr_once *once, void (*init_routine)(void));
 
 /* --- One-time event notification ---
 
@@ -151,43 +151,43 @@
   It requires no destruction.  */
 
 /* Initialize *ev. */
-GPR_API void gpr_event_init(gpr_event *ev);
+GPRAPI void gpr_event_init(gpr_event *ev);
 
 /* Set *ev so that gpr_event_get() and gpr_event_wait() will return value.
    Requires:  *ev initialized; value != NULL; no prior or concurrent calls to
    gpr_event_set(ev, ...) since initialization.  */
-GPR_API void gpr_event_set(gpr_event *ev, void *value);
+GPRAPI void gpr_event_set(gpr_event *ev, void *value);
 
 /* Return the value set by gpr_event_set(ev, ...), or NULL if no such call has
    completed.  If the result is non-NULL, all operations that occurred prior to
    the gpr_event_set(ev, ...) set will be visible after this call returns.
    Requires:  *ev initialized.  This operation is faster than acquiring a mutex
    on most platforms.  */
-GPR_API void *gpr_event_get(gpr_event *ev);
+GPRAPI void *gpr_event_get(gpr_event *ev);
 
 /* Wait until *ev is set by gpr_event_set(ev, ...), or abs_deadline is
    exceeded, then return gpr_event_get(ev).  Requires:  *ev initialized.  Use
    abs_deadline==gpr_inf_future for no deadline.  When the event has been
    signalled before the call, this operation is faster than acquiring a mutex
    on most platforms.  */
-GPR_API void *gpr_event_wait(gpr_event *ev, gpr_timespec abs_deadline);
+GPRAPI void *gpr_event_wait(gpr_event *ev, gpr_timespec abs_deadline);
 
 /* --- Reference counting ---
 
    These calls act on the type gpr_refcount.  It requires no destruction.  */
 
 /* Initialize *r to value n.  */
-GPR_API void gpr_ref_init(gpr_refcount *r, int n);
+GPRAPI void gpr_ref_init(gpr_refcount *r, int n);
 
 /* Increment the reference count *r.  Requires *r initialized. */
-GPR_API void gpr_ref(gpr_refcount *r);
+GPRAPI void gpr_ref(gpr_refcount *r);
 
 /* Increment the reference count *r by n.  Requires *r initialized, n > 0. */
-GPR_API void gpr_refn(gpr_refcount *r, int n);
+GPRAPI void gpr_refn(gpr_refcount *r, int n);
 
 /* Decrement the reference count *r and return non-zero iff it has reached
    zero. .  Requires *r initialized. */
-GPR_API int gpr_unref(gpr_refcount *r);
+GPRAPI int gpr_unref(gpr_refcount *r);
 
 /* --- Stats counters ---
 
@@ -198,13 +198,13 @@
    synchronize other events.  */
 
 /* Initialize *c to the value n. */
-GPR_API void gpr_stats_init(gpr_stats_counter *c, intptr_t n);
+GPRAPI void gpr_stats_init(gpr_stats_counter *c, intptr_t n);
 
 /* *c += inc.  Requires: *c initialized. */
-GPR_API void gpr_stats_inc(gpr_stats_counter *c, intptr_t inc);
+GPRAPI void gpr_stats_inc(gpr_stats_counter *c, intptr_t inc);
 
 /* Return *c.  Requires: *c initialized. */
-GPR_API intptr_t gpr_stats_read(const gpr_stats_counter *c);
+GPRAPI intptr_t gpr_stats_read(const gpr_stats_counter *c);
 
 /* ==================Example use of interface===================
    A producer-consumer queue of up to N integers,
diff --git a/include/grpc/impl/codegen/time.h b/include/grpc/impl/codegen/time.h
index 4ed1c3c..c22bedf 100644
--- a/include/grpc/impl/codegen/time.h
+++ b/include/grpc/impl/codegen/time.h
@@ -69,10 +69,10 @@
 } gpr_timespec;
 
 /* Time constants. */
-GPR_API gpr_timespec
+GPRAPI gpr_timespec
 gpr_time_0(gpr_clock_type type); /* The zero time interval. */
-GPR_API gpr_timespec gpr_inf_future(gpr_clock_type type); /* The far future */
-GPR_API gpr_timespec gpr_inf_past(gpr_clock_type type);   /* The far past. */
+GPRAPI gpr_timespec gpr_inf_future(gpr_clock_type type); /* The far future */
+GPRAPI gpr_timespec gpr_inf_past(gpr_clock_type type);   /* The far past. */
 
 #define GPR_MS_PER_SEC 1000
 #define GPR_US_PER_SEC 1000000
@@ -82,48 +82,46 @@
 #define GPR_US_PER_MS 1000
 
 /* initialize time subsystem */
-GPR_API void gpr_time_init(void);
+GPRAPI void gpr_time_init(void);
 
 /* Return the current time measured from the given clocks epoch. */
-GPR_API gpr_timespec gpr_now(gpr_clock_type clock);
+GPRAPI gpr_timespec gpr_now(gpr_clock_type clock);
 
 /* Convert a timespec from one clock to another */
-GPR_API gpr_timespec
+GPRAPI gpr_timespec
 gpr_convert_clock_type(gpr_timespec t, gpr_clock_type target_clock);
 
 /* Return -ve, 0, or +ve according to whether a < b, a == b, or a > b
    respectively.  */
-GPR_API int gpr_time_cmp(gpr_timespec a, gpr_timespec b);
+GPRAPI int gpr_time_cmp(gpr_timespec a, gpr_timespec b);
 
-GPR_API gpr_timespec gpr_time_max(gpr_timespec a, gpr_timespec b);
-GPR_API gpr_timespec gpr_time_min(gpr_timespec a, gpr_timespec b);
+GPRAPI gpr_timespec gpr_time_max(gpr_timespec a, gpr_timespec b);
+GPRAPI gpr_timespec gpr_time_min(gpr_timespec a, gpr_timespec b);
 
 /* Add and subtract times.  Calculations saturate at infinities. */
-GPR_API gpr_timespec gpr_time_add(gpr_timespec a, gpr_timespec b);
-GPR_API gpr_timespec gpr_time_sub(gpr_timespec a, gpr_timespec b);
+GPRAPI gpr_timespec gpr_time_add(gpr_timespec a, gpr_timespec b);
+GPRAPI gpr_timespec gpr_time_sub(gpr_timespec a, gpr_timespec b);
 
 /* Return a timespec representing a given number of time units. INT64_MIN is
    interpreted as gpr_inf_past, and INT64_MAX as gpr_inf_future.  */
-GPR_API gpr_timespec gpr_time_from_micros(int64_t x, gpr_clock_type clock_type);
-GPR_API gpr_timespec gpr_time_from_nanos(int64_t x, gpr_clock_type clock_type);
-GPR_API gpr_timespec gpr_time_from_millis(int64_t x, gpr_clock_type clock_type);
-GPR_API gpr_timespec
-gpr_time_from_seconds(int64_t x, gpr_clock_type clock_type);
-GPR_API gpr_timespec
-gpr_time_from_minutes(int64_t x, gpr_clock_type clock_type);
-GPR_API gpr_timespec gpr_time_from_hours(int64_t x, gpr_clock_type clock_type);
+GPRAPI gpr_timespec gpr_time_from_micros(int64_t x, gpr_clock_type clock_type);
+GPRAPI gpr_timespec gpr_time_from_nanos(int64_t x, gpr_clock_type clock_type);
+GPRAPI gpr_timespec gpr_time_from_millis(int64_t x, gpr_clock_type clock_type);
+GPRAPI gpr_timespec gpr_time_from_seconds(int64_t x, gpr_clock_type clock_type);
+GPRAPI gpr_timespec gpr_time_from_minutes(int64_t x, gpr_clock_type clock_type);
+GPRAPI gpr_timespec gpr_time_from_hours(int64_t x, gpr_clock_type clock_type);
 
-GPR_API int32_t gpr_time_to_millis(gpr_timespec timespec);
+GPRAPI int32_t gpr_time_to_millis(gpr_timespec timespec);
 
 /* Return 1 if two times are equal or within threshold of each other,
    0 otherwise */
-GPR_API int gpr_time_similar(gpr_timespec a, gpr_timespec b,
-                             gpr_timespec threshold);
+GPRAPI int gpr_time_similar(gpr_timespec a, gpr_timespec b,
+                            gpr_timespec threshold);
 
 /* Sleep until at least 'until' - an absolute timeout */
-GPR_API void gpr_sleep_until(gpr_timespec until);
+GPRAPI void gpr_sleep_until(gpr_timespec until);
 
-GPR_API double gpr_timespec_to_micros(gpr_timespec t);
+GPRAPI double gpr_timespec_to_micros(gpr_timespec t);
 
 #ifdef __cplusplus
 }
diff --git a/include/grpc/support/avl.h b/include/grpc/support/avl.h
index 3433124..28eb5b1 100644
--- a/include/grpc/support/avl.h
+++ b/include/grpc/support/avl.h
@@ -69,23 +69,23 @@
 } gpr_avl;
 
 /** create an immutable AVL tree */
-GPR_API gpr_avl gpr_avl_create(const gpr_avl_vtable *vtable);
+GPRAPI gpr_avl gpr_avl_create(const gpr_avl_vtable *vtable);
 /** add a reference to an existing tree - returns
     the tree as a convenience */
-GPR_API gpr_avl gpr_avl_ref(gpr_avl avl);
+GPRAPI gpr_avl gpr_avl_ref(gpr_avl avl);
 /** remove a reference to a tree - destroying it if there
     are no references left */
-GPR_API void gpr_avl_unref(gpr_avl avl);
+GPRAPI void gpr_avl_unref(gpr_avl avl);
 /** return a new tree with (key, value) added to avl.
     implicitly unrefs avl to allow easy chaining.
     if key exists in avl, the new tree's key entry updated
     (i.e. a duplicate is not created) */
-GPR_API gpr_avl gpr_avl_add(gpr_avl avl, void *key, void *value);
+GPRAPI gpr_avl gpr_avl_add(gpr_avl avl, void *key, void *value);
 /** return a new tree with key deleted */
-GPR_API gpr_avl gpr_avl_remove(gpr_avl avl, void *key);
+GPRAPI gpr_avl gpr_avl_remove(gpr_avl avl, void *key);
 /** lookup key, and return the associated value.
     does not mutate avl.
     returns NULL if key is not found. */
-GPR_API void *gpr_avl_get(gpr_avl avl, void *key);
+GPRAPI void *gpr_avl_get(gpr_avl avl, void *key);
 
 #endif
diff --git a/include/grpc/support/cmdline.h b/include/grpc/support/cmdline.h
index 6f442e3..55e2ffd 100644
--- a/include/grpc/support/cmdline.h
+++ b/include/grpc/support/cmdline.h
@@ -70,31 +70,31 @@
 
 /* Construct a command line parser: takes a short description of the tool
    doing the parsing */
-GPR_API gpr_cmdline *gpr_cmdline_create(const char *description);
+GPRAPI gpr_cmdline *gpr_cmdline_create(const char *description);
 /* Add an integer parameter, with a name (used on the command line) and some
    helpful text (used in the command usage) */
-GPR_API void gpr_cmdline_add_int(gpr_cmdline *cl, const char *name,
-                                 const char *help, int *value);
+GPRAPI void gpr_cmdline_add_int(gpr_cmdline *cl, const char *name,
+                                const char *help, int *value);
 /* The same, for a boolean flag */
-GPR_API void gpr_cmdline_add_flag(gpr_cmdline *cl, const char *name,
-                                  const char *help, int *value);
+GPRAPI void gpr_cmdline_add_flag(gpr_cmdline *cl, const char *name,
+                                 const char *help, int *value);
 /* And for a string */
-GPR_API void gpr_cmdline_add_string(gpr_cmdline *cl, const char *name,
-                                    const char *help, char **value);
+GPRAPI void gpr_cmdline_add_string(gpr_cmdline *cl, const char *name,
+                                   const char *help, char **value);
 /* Set a callback for non-named arguments */
-GPR_API void gpr_cmdline_on_extra_arg(
+GPRAPI void gpr_cmdline_on_extra_arg(
     gpr_cmdline *cl, const char *name, const char *help,
     void (*on_extra_arg)(void *user_data, const char *arg), void *user_data);
 /* Enable surviving failure: default behavior is to exit the process */
-GPR_API void gpr_cmdline_set_survive_failure(gpr_cmdline *cl);
+GPRAPI void gpr_cmdline_set_survive_failure(gpr_cmdline *cl);
 /* Parse the command line; returns 1 on success, on failure either dies
    (by default) or returns 0 if gpr_cmdline_set_survive_failure() has been
    called */
-GPR_API int gpr_cmdline_parse(gpr_cmdline *cl, int argc, char **argv);
+GPRAPI int gpr_cmdline_parse(gpr_cmdline *cl, int argc, char **argv);
 /* Destroy the parser */
-GPR_API void gpr_cmdline_destroy(gpr_cmdline *cl);
+GPRAPI void gpr_cmdline_destroy(gpr_cmdline *cl);
 /* Get a string describing usage */
-GPR_API char *gpr_cmdline_usage_string(gpr_cmdline *cl, const char *argv0);
+GPRAPI char *gpr_cmdline_usage_string(gpr_cmdline *cl, const char *argv0);
 
 #ifdef __cplusplus
 }
diff --git a/include/grpc/support/cpu.h b/include/grpc/support/cpu.h
index db4bdd4..3ca83b5 100644
--- a/include/grpc/support/cpu.h
+++ b/include/grpc/support/cpu.h
@@ -44,13 +44,13 @@
 
 /* Return the number of CPU cores on the current system. Will return 0 if
    the information is not available. */
-GPR_API unsigned gpr_cpu_num_cores(void);
+GPRAPI unsigned gpr_cpu_num_cores(void);
 
 /* Return the CPU on which the current thread is executing; N.B. This should
    be considered advisory only - it is possible that the thread is switched
    to a different CPU at any time. Returns a value in range
    [0, gpr_cpu_num_cores() - 1] */
-GPR_API unsigned gpr_cpu_current_cpu(void);
+GPRAPI unsigned gpr_cpu_current_cpu(void);
 
 #ifdef __cplusplus
 }  // extern "C"
diff --git a/include/grpc/support/histogram.h b/include/grpc/support/histogram.h
index 9c807ea..c34c8c8 100644
--- a/include/grpc/support/histogram.h
+++ b/include/grpc/support/histogram.h
@@ -43,34 +43,34 @@
 
 typedef struct gpr_histogram gpr_histogram;
 
-GPR_API gpr_histogram *gpr_histogram_create(double resolution,
-                                            double max_bucket_start);
-GPR_API void gpr_histogram_destroy(gpr_histogram *h);
-GPR_API void gpr_histogram_add(gpr_histogram *h, double x);
+GPRAPI gpr_histogram *gpr_histogram_create(double resolution,
+                                           double max_bucket_start);
+GPRAPI void gpr_histogram_destroy(gpr_histogram *h);
+GPRAPI void gpr_histogram_add(gpr_histogram *h, double x);
 
 /* The following merges the second histogram into the first. It only works
    if they have the same buckets and resolution. Returns 0 on failure, 1
    on success */
-GPR_API int gpr_histogram_merge(gpr_histogram *dst, const gpr_histogram *src);
+GPRAPI int gpr_histogram_merge(gpr_histogram *dst, const gpr_histogram *src);
 
-GPR_API double gpr_histogram_percentile(gpr_histogram *histogram,
-                                        double percentile);
-GPR_API double gpr_histogram_mean(gpr_histogram *histogram);
-GPR_API double gpr_histogram_stddev(gpr_histogram *histogram);
-GPR_API double gpr_histogram_variance(gpr_histogram *histogram);
-GPR_API double gpr_histogram_maximum(gpr_histogram *histogram);
-GPR_API double gpr_histogram_minimum(gpr_histogram *histogram);
-GPR_API double gpr_histogram_count(gpr_histogram *histogram);
-GPR_API double gpr_histogram_sum(gpr_histogram *histogram);
-GPR_API double gpr_histogram_sum_of_squares(gpr_histogram *histogram);
+GPRAPI double gpr_histogram_percentile(gpr_histogram *histogram,
+                                       double percentile);
+GPRAPI double gpr_histogram_mean(gpr_histogram *histogram);
+GPRAPI double gpr_histogram_stddev(gpr_histogram *histogram);
+GPRAPI double gpr_histogram_variance(gpr_histogram *histogram);
+GPRAPI double gpr_histogram_maximum(gpr_histogram *histogram);
+GPRAPI double gpr_histogram_minimum(gpr_histogram *histogram);
+GPRAPI double gpr_histogram_count(gpr_histogram *histogram);
+GPRAPI double gpr_histogram_sum(gpr_histogram *histogram);
+GPRAPI double gpr_histogram_sum_of_squares(gpr_histogram *histogram);
 
-GPR_API const uint32_t *gpr_histogram_get_contents(gpr_histogram *histogram,
-                                                   size_t *count);
-GPR_API void gpr_histogram_merge_contents(gpr_histogram *histogram,
-                                          const uint32_t *data,
-                                          size_t data_count, double min_seen,
-                                          double max_seen, double sum,
-                                          double sum_of_squares, double count);
+GPRAPI const uint32_t *gpr_histogram_get_contents(gpr_histogram *histogram,
+                                                  size_t *count);
+GPRAPI void gpr_histogram_merge_contents(gpr_histogram *histogram,
+                                         const uint32_t *data,
+                                         size_t data_count, double min_seen,
+                                         double max_seen, double sum,
+                                         double sum_of_squares, double count);
 
 #ifdef __cplusplus
 }
diff --git a/include/grpc/support/host_port.h b/include/grpc/support/host_port.h
index ee9c294..53cc917 100644
--- a/include/grpc/support/host_port.h
+++ b/include/grpc/support/host_port.h
@@ -50,14 +50,14 @@
    destroyed using gpr_free().
 
    In the unlikely event of an error, returns -1 and sets *out to NULL. */
-GPR_API int gpr_join_host_port(char **out, const char *host, int port);
+GPRAPI int gpr_join_host_port(char **out, const char *host, int port);
 
 /* Given a name in the form "host:port" or "[ho:st]:port", split into hostname
    and port number, into newly allocated strings, which must later be
    destroyed using gpr_free().
    Return 1 on success, 0 on failure. Guarantees *host and *port == NULL on
    failure. */
-GPR_API int gpr_split_host_port(const char *name, char **host, char **port);
+GPRAPI int gpr_split_host_port(const char *name, char **host, char **port);
 
 #ifdef __cplusplus
 }
diff --git a/include/grpc/support/log_win32.h b/include/grpc/support/log_win32.h
index 1470e5b..49c9ab0 100644
--- a/include/grpc/support/log_win32.h
+++ b/include/grpc/support/log_win32.h
@@ -42,7 +42,7 @@
  * formatted error message, corresponding to the error messageid.
  * Use in conjunction with GetLastError() et al.
  */
-GPR_API char *gpr_format_message(int messageid);
+GPRAPI char *gpr_format_message(int messageid);
 
 #ifdef __cplusplus
 }
diff --git a/include/grpc/support/string_util.h b/include/grpc/support/string_util.h
index 74f2cb3..6fc38cb 100644
--- a/include/grpc/support/string_util.h
+++ b/include/grpc/support/string_util.h
@@ -42,7 +42,7 @@
 
 /* Returns a copy of src that can be passed to gpr_free().
    If allocation fails or if src is NULL, returns NULL. */
-GPR_API char *gpr_strdup(const char *src);
+GPRAPI char *gpr_strdup(const char *src);
 
 /* printf to a newly-allocated string.  The set of supported formats may vary
    between platforms.
@@ -52,7 +52,7 @@
 
    On error, returns -1 and sets *strp to NULL. If the format string is bad,
    the result is undefined. */
-GPR_API int gpr_asprintf(char **strp, const char *format, ...);
+GPRAPI int gpr_asprintf(char **strp, const char *format, ...);
 
 #ifdef __cplusplus
 }
diff --git a/include/grpc/support/subprocess.h b/include/grpc/support/subprocess.h
index ffbdf67..6a49460 100644
--- a/include/grpc/support/subprocess.h
+++ b/include/grpc/support/subprocess.h
@@ -43,14 +43,14 @@
 typedef struct gpr_subprocess gpr_subprocess;
 
 /* .exe on windows, empty on unices */
-GPR_API const char *gpr_subprocess_binary_extension();
+GPRAPI const char *gpr_subprocess_binary_extension();
 
-GPR_API gpr_subprocess *gpr_subprocess_create(int argc, const char **argv);
+GPRAPI gpr_subprocess *gpr_subprocess_create(int argc, const char **argv);
 /* if subprocess has not been joined, kill it */
-GPR_API void gpr_subprocess_destroy(gpr_subprocess *p);
+GPRAPI void gpr_subprocess_destroy(gpr_subprocess *p);
 /* returns exit status; can be called at most once */
-GPR_API int gpr_subprocess_join(gpr_subprocess *p);
-GPR_API void gpr_subprocess_interrupt(gpr_subprocess *p);
+GPRAPI int gpr_subprocess_join(gpr_subprocess *p);
+GPRAPI void gpr_subprocess_interrupt(gpr_subprocess *p);
 
 #ifdef __cplusplus
 }  // extern "C"
diff --git a/include/grpc/support/thd.h b/include/grpc/support/thd.h
index 84e964f..abe57eb 100644
--- a/include/grpc/support/thd.h
+++ b/include/grpc/support/thd.h
@@ -59,30 +59,30 @@
    in *t, and return true.  If there are insufficient resources, return false.
    If options==NULL, default options are used.
    The thread is immediately runnable, and exits when (*thd_body)() returns.  */
-GPR_API int gpr_thd_new(gpr_thd_id *t, void (*thd_body)(void *arg), void *arg,
-                        const gpr_thd_options *options);
+GPRAPI int gpr_thd_new(gpr_thd_id *t, void (*thd_body)(void *arg), void *arg,
+                       const gpr_thd_options *options);
 
 /* Return a gpr_thd_options struct with all fields set to defaults. */
-GPR_API gpr_thd_options gpr_thd_options_default(void);
+GPRAPI gpr_thd_options gpr_thd_options_default(void);
 
 /* Set the thread to become detached on startup - this is the default. */
-GPR_API void gpr_thd_options_set_detached(gpr_thd_options *options);
+GPRAPI void gpr_thd_options_set_detached(gpr_thd_options *options);
 
 /* Set the thread to become joinable - mutually exclusive with detached. */
-GPR_API void gpr_thd_options_set_joinable(gpr_thd_options *options);
+GPRAPI void gpr_thd_options_set_joinable(gpr_thd_options *options);
 
 /* Returns non-zero if the option detached is set. */
-GPR_API int gpr_thd_options_is_detached(const gpr_thd_options *options);
+GPRAPI int gpr_thd_options_is_detached(const gpr_thd_options *options);
 
 /* Returns non-zero if the option joinable is set. */
-GPR_API int gpr_thd_options_is_joinable(const gpr_thd_options *options);
+GPRAPI int gpr_thd_options_is_joinable(const gpr_thd_options *options);
 
 /* Returns the identifier of the current thread. */
-GPR_API gpr_thd_id gpr_thd_currentid(void);
+GPRAPI gpr_thd_id gpr_thd_currentid(void);
 
 /* Blocks until the specified thread properly terminates.
    Calling this on a detached thread has unpredictable results. */
-GPR_API void gpr_thd_join(gpr_thd_id t);
+GPRAPI void gpr_thd_join(gpr_thd_id t);
 
 #ifdef __cplusplus
 }
diff --git a/setup.py b/setup.py
index ceca6f6..69e59e3 100644
--- a/setup.py
+++ b/setup.py
@@ -94,10 +94,10 @@
 if not "win32" in sys.platform:
   EXTENSION_LIBRARIES += ('m',)
 
-DEFINE_MACROS = (('OPENSSL_NO_ASM', 1), ('_WIN32_WINNT', 0x600))
+DEFINE_MACROS = (('OPENSSL_NO_ASM', 1), ('_WIN32_WINNT', 0x600), ('GPR_BACKWARDS_COMPATIBILITY_MODE', 1),)
 
-CFLAGS = ()
 LDFLAGS = ()
+CFLAGS = ()
 if "linux" in sys.platform:
   LDFLAGS += ('-Wl,-wrap,memcpy',)
 if "linux" in sys.platform or "darwin" in sys.platform:
diff --git a/src/core/census/grpc_filter.c b/src/core/census/grpc_filter.c
index a8db32b..c8aaf31 100644
--- a/src/core/census/grpc_filter.c
+++ b/src/core/census/grpc_filter.c
@@ -107,8 +107,8 @@
   if (op->recv_initial_metadata) {
     /* substitute our callback for the op callback */
     calld->recv_initial_metadata = op->recv_initial_metadata;
-    calld->on_done_recv = op->on_complete;
-    op->on_complete = &calld->finish_recv;
+    calld->on_done_recv = op->recv_initial_metadata_ready;
+    op->recv_initial_metadata_ready = &calld->finish_recv;
   }
 }
 
diff --git a/src/core/channel/http_client_filter.c b/src/core/channel/http_client_filter.c
index 43eee04..1aa2720 100644
--- a/src/core/channel/http_client_filter.c
+++ b/src/core/channel/http_client_filter.c
@@ -127,8 +127,8 @@
   if (op->recv_initial_metadata != NULL) {
     /* substitute our callback for the higher callback */
     calld->recv_initial_metadata = op->recv_initial_metadata;
-    calld->on_done_recv = op->on_complete;
-    op->on_complete = &calld->hc_on_recv;
+    calld->on_done_recv = op->recv_initial_metadata_ready;
+    op->recv_initial_metadata_ready = &calld->hc_on_recv;
   }
 }
 
diff --git a/src/core/channel/http_server_filter.c b/src/core/channel/http_server_filter.c
index bb75323..370f8db 100644
--- a/src/core/channel/http_server_filter.c
+++ b/src/core/channel/http_server_filter.c
@@ -186,8 +186,8 @@
   if (op->recv_initial_metadata) {
     /* substitute our callback for the higher callback */
     calld->recv_initial_metadata = op->recv_initial_metadata;
-    calld->on_done_recv = op->on_complete;
-    op->on_complete = &calld->hs_on_recv;
+    calld->on_done_recv = op->recv_initial_metadata_ready;
+    op->recv_initial_metadata_ready = &calld->hs_on_recv;
   }
 }
 
diff --git a/src/core/channel/subchannel_call_holder.c b/src/core/channel/subchannel_call_holder.c
index 3ad9fd9..81297c8 100644
--- a/src/core/channel/subchannel_call_holder.c
+++ b/src/core/channel/subchannel_call_holder.c
@@ -241,10 +241,8 @@
                         grpc_subchannel_call_holder *holder) {
   size_t i;
   for (i = 0; i < holder->waiting_ops_count; i++) {
-    grpc_exec_ctx_enqueue(exec_ctx, holder->waiting_ops[i].on_complete, false,
-                          NULL);
-    grpc_exec_ctx_enqueue(exec_ctx, holder->waiting_ops[i].recv_message_ready,
-                          false, NULL);
+    grpc_transport_stream_op_finish_with_failure(exec_ctx,
+                                                 &holder->waiting_ops[i]);
   }
   holder->waiting_ops_count = 0;
 }
diff --git a/src/core/security/server_auth_filter.c b/src/core/security/server_auth_filter.c
index 4c78711..3d8e5e8 100644
--- a/src/core/security/server_auth_filter.c
+++ b/src/core/security/server_auth_filter.c
@@ -176,8 +176,8 @@
   if (op->recv_initial_metadata != NULL) {
     /* substitute our callback for the higher callback */
     calld->recv_initial_metadata = op->recv_initial_metadata;
-    calld->on_done_recv = op->on_complete;
-    op->on_complete = &calld->auth_on_recv;
+    calld->on_done_recv = op->recv_initial_metadata_ready;
+    op->recv_initial_metadata_ready = &calld->auth_on_recv;
     calld->transport_op = *op;
   }
 }
diff --git a/src/core/support/env_linux.c b/src/core/support/env_linux.c
index 442cd82..1ca6fa1 100644
--- a/src/core/support/env_linux.c
+++ b/src/core/support/env_linux.c
@@ -52,6 +52,7 @@
 #include "src/core/support/string.h"
 
 char *gpr_getenv(const char *name) {
+#if defined(GPR_BACKWARDS_COMPATIBILITY_MODE)
   typedef char *(*getenv_type)(const char *);
   static getenv_type getenv_func = NULL;
   /* Check to see which getenv variant is supported (go from most
@@ -62,6 +63,10 @@
   }
   char *result = getenv_func(name);
   return result == NULL ? result : gpr_strdup(result);
+#else
+  char *result = secure_getenv(name);
+  return result == NULL ? result : gpr_strdup(result);
+#endif
 }
 
 void gpr_setenv(const char *name, const char *value) {
diff --git a/src/core/support/time_posix.c b/src/core/support/time_posix.c
index 1f92d7f..36d75e7 100644
--- a/src/core/support/time_posix.c
+++ b/src/core/support/time_posix.c
@@ -86,7 +86,7 @@
     gpr_precise_clock_now(&ret);
     return ret;
   } else {
-#if defined(__linux__) && !defined(GPR_NO_DIRECT_SYSCALLS)
+#if defined(GPR_BACKWARDS_COMPATIBILITY_MODE) && defined(__linux__)
     /* avoid ABI problems by invoking syscalls directly */
     syscall(SYS_clock_gettime, clockid_for_gpr_clock[clock_type], &now);
 #else
diff --git a/src/core/surface/call.c b/src/core/surface/call.c
index 9495e74..1b117aa 100644
--- a/src/core/surface/call.c
+++ b/src/core/surface/call.c
@@ -159,6 +159,9 @@
   uint8_t receiving_message;
   uint8_t received_final_op;
 
+  /* have we received initial metadata */
+  bool has_initial_md_been_received;
+
   batch_control active_batches[MAX_CONCURRENT_BATCHES];
 
   /* first idx: is_receiving, second idx: is_trailing */
@@ -200,6 +203,7 @@
   gpr_slice receiving_slice;
   grpc_closure receiving_slice_ready;
   grpc_closure receiving_stream_ready;
+  grpc_closure receiving_initial_metadata_ready;
   uint32_t test_only_last_message_flags;
 
   union {
@@ -212,6 +216,11 @@
       int *cancelled;
     } server;
   } final_op;
+
+  struct {
+    void *bctlp;
+    bool success;
+  } saved_receiving_stream_ready_ctx;
 };
 
 #define CALL_STACK_FROM_CALL(call) ((grpc_call_stack *)((call) + 1))
@@ -993,6 +1002,94 @@
   }
 }
 
+static void process_data_after_md(grpc_exec_ctx *exec_ctx, batch_control *bctl,
+                                  bool success) {
+  grpc_call *call = bctl->call;
+  if (call->receiving_stream == NULL) {
+    *call->receiving_buffer = NULL;
+    call->receiving_message = 0;
+    if (gpr_unref(&bctl->steps_to_complete)) {
+      post_batch_completion(exec_ctx, bctl);
+    }
+  } else if (call->receiving_stream->length >
+             grpc_channel_get_max_message_length(call->channel)) {
+    cancel_with_status(exec_ctx, call, GRPC_STATUS_INTERNAL,
+                       "Max message size exceeded");
+    grpc_byte_stream_destroy(exec_ctx, call->receiving_stream);
+    call->receiving_stream = NULL;
+    *call->receiving_buffer = NULL;
+    call->receiving_message = 0;
+    if (gpr_unref(&bctl->steps_to_complete)) {
+      post_batch_completion(exec_ctx, bctl);
+    }
+  } else {
+    call->test_only_last_message_flags = call->receiving_stream->flags;
+    if ((call->receiving_stream->flags & GRPC_WRITE_INTERNAL_COMPRESS) &&
+        (call->compression_algorithm > GRPC_COMPRESS_NONE)) {
+      *call->receiving_buffer = grpc_raw_compressed_byte_buffer_create(
+          NULL, 0, call->compression_algorithm);
+    } else {
+      *call->receiving_buffer = grpc_raw_byte_buffer_create(NULL, 0);
+    }
+    grpc_closure_init(&call->receiving_slice_ready, receiving_slice_ready,
+                      bctl);
+    continue_receiving_slices(exec_ctx, bctl);
+    /* early out */
+    return;
+  }
+}
+
+static void receiving_stream_ready(grpc_exec_ctx *exec_ctx, void *bctlp,
+                                   bool success) {
+  batch_control *bctl = bctlp;
+  grpc_call *call = bctl->call;
+
+  gpr_mu_lock(&bctl->call->mu);
+  if (bctl->call->has_initial_md_been_received) {
+    gpr_mu_unlock(&bctl->call->mu);
+    process_data_after_md(exec_ctx, bctlp, success);
+  } else {
+    call->saved_receiving_stream_ready_ctx.bctlp = bctlp;
+    call->saved_receiving_stream_ready_ctx.success = success;
+    gpr_mu_unlock(&bctl->call->mu);
+  }
+}
+
+static void receiving_initial_metadata_ready(grpc_exec_ctx *exec_ctx,
+                                             void *bctlp, bool success) {
+  batch_control *bctl = bctlp;
+  grpc_call *call = bctl->call;
+
+  gpr_mu_lock(&call->mu);
+
+  grpc_metadata_batch *md =
+      &call->metadata_batch[1 /* is_receiving */][0 /* is_trailing */];
+  grpc_metadata_batch_filter(md, recv_initial_filter, call);
+  call->has_initial_md_been_received = true;
+
+  if (gpr_time_cmp(md->deadline, gpr_inf_future(md->deadline.clock_type)) !=
+          0 &&
+      !call->is_client) {
+    GPR_TIMER_BEGIN("set_deadline_alarm", 0);
+    set_deadline_alarm(exec_ctx, call, md->deadline);
+    GPR_TIMER_END("set_deadline_alarm", 0);
+  }
+
+  if (call->saved_receiving_stream_ready_ctx.bctlp != NULL) {
+    grpc_closure *saved_rsr_closure = grpc_closure_create(
+        receiving_stream_ready, call->saved_receiving_stream_ready_ctx.bctlp);
+    grpc_exec_ctx_enqueue(exec_ctx, saved_rsr_closure,
+                          call->saved_receiving_stream_ready_ctx.success, NULL);
+    call->saved_receiving_stream_ready_ctx.bctlp = NULL;
+  }
+
+  gpr_mu_unlock(&call->mu);
+
+  if (gpr_unref(&bctl->steps_to_complete)) {
+    post_batch_completion(exec_ctx, bctl);
+  }
+}
+
 static void finish_batch(grpc_exec_ctx *exec_ctx, void *bctlp, bool success) {
   batch_control *bctl = bctlp;
   grpc_call *call = bctl->call;
@@ -1011,19 +1108,6 @@
     grpc_metadata_batch_destroy(
         &call->metadata_batch[0 /* is_receiving */][1 /* is_trailing */]);
   }
-  if (bctl->recv_initial_metadata) {
-    grpc_metadata_batch *md =
-        &call->metadata_batch[1 /* is_receiving */][0 /* is_trailing */];
-    grpc_metadata_batch_filter(md, recv_initial_filter, call);
-
-    if (gpr_time_cmp(md->deadline, gpr_inf_future(md->deadline.clock_type)) !=
-            0 &&
-        !call->is_client) {
-      GPR_TIMER_BEGIN("set_deadline_alarm", 0);
-      set_deadline_alarm(exec_ctx, call, md->deadline);
-      GPR_TIMER_END("set_deadline_alarm", 0);
-    }
-  }
   if (bctl->recv_final_op) {
     grpc_metadata_batch *md =
         &call->metadata_batch[1 /* is_receiving */][1 /* is_trailing */];
@@ -1065,45 +1149,6 @@
   }
 }
 
-static void receiving_stream_ready(grpc_exec_ctx *exec_ctx, void *bctlp,
-                                   bool success) {
-  batch_control *bctl = bctlp;
-  grpc_call *call = bctl->call;
-
-  if (call->receiving_stream == NULL) {
-    *call->receiving_buffer = NULL;
-    call->receiving_message = 0;
-    if (gpr_unref(&bctl->steps_to_complete)) {
-      post_batch_completion(exec_ctx, bctl);
-    }
-  } else if (call->receiving_stream->length >
-             grpc_channel_get_max_message_length(call->channel)) {
-    cancel_with_status(exec_ctx, call, GRPC_STATUS_INTERNAL,
-                       "Max message size exceeded");
-    grpc_byte_stream_destroy(exec_ctx, call->receiving_stream);
-    call->receiving_stream = NULL;
-    *call->receiving_buffer = NULL;
-    call->receiving_message = 0;
-    if (gpr_unref(&bctl->steps_to_complete)) {
-      post_batch_completion(exec_ctx, bctl);
-    }
-  } else {
-    call->test_only_last_message_flags = call->receiving_stream->flags;
-    if ((call->receiving_stream->flags & GRPC_WRITE_INTERNAL_COMPRESS) &&
-        (call->compression_algorithm > GRPC_COMPRESS_NONE)) {
-      *call->receiving_buffer = grpc_raw_compressed_byte_buffer_create(
-          NULL, 0, call->compression_algorithm);
-    } else {
-      *call->receiving_buffer = grpc_raw_byte_buffer_create(NULL, 0);
-    }
-    grpc_closure_init(&call->receiving_slice_ready, receiving_slice_ready,
-                      bctl);
-    continue_receiving_slices(exec_ctx, bctl);
-    /* early out */
-    return;
-  }
-}
-
 static grpc_call_error call_start_batch(grpc_exec_ctx *exec_ctx,
                                         grpc_call *call, const grpc_op *ops,
                                         size_t nops, void *notify_tag,
@@ -1273,9 +1318,14 @@
         }
         call->received_initial_metadata = 1;
         call->buffered_metadata[0] = op->data.recv_initial_metadata;
+        grpc_closure_init(&call->receiving_initial_metadata_ready,
+                          receiving_initial_metadata_ready, bctl);
         bctl->recv_initial_metadata = 1;
         stream_op.recv_initial_metadata =
             &call->metadata_batch[1 /* is_receiving */][0 /* is_trailing */];
+        stream_op.recv_initial_metadata_ready =
+            &call->receiving_initial_metadata_ready;
+        num_completion_callbacks_needed++;
         break;
       case GRPC_OP_RECV_MESSAGE:
         /* Flag validation: currently allow no flags */
diff --git a/src/core/surface/lame_client.c b/src/core/surface/lame_client.c
index 705996c..537069e 100644
--- a/src/core/surface/lame_client.c
+++ b/src/core/surface/lame_client.c
@@ -78,8 +78,7 @@
   } else if (op->recv_trailing_metadata != NULL) {
     fill_metadata(elem, op->recv_trailing_metadata);
   }
-  grpc_exec_ctx_enqueue(exec_ctx, op->on_complete, false, NULL);
-  grpc_exec_ctx_enqueue(exec_ctx, op->recv_message_ready, false, NULL);
+  grpc_transport_stream_op_finish_with_failure(exec_ctx, op);
 }
 
 static char *lame_get_peer(grpc_exec_ctx *exec_ctx, grpc_call_element *elem) {
diff --git a/src/core/surface/server.c b/src/core/surface/server.c
index 42cffcc..fb5e0d4 100644
--- a/src/core/surface/server.c
+++ b/src/core/surface/server.c
@@ -596,8 +596,8 @@
 
   if (op->recv_initial_metadata != NULL) {
     calld->recv_initial_metadata = op->recv_initial_metadata;
-    calld->on_done_recv_initial_metadata = op->on_complete;
-    op->on_complete = &calld->server_on_recv_initial_metadata;
+    calld->on_done_recv_initial_metadata = op->recv_initial_metadata_ready;
+    op->recv_initial_metadata_ready = &calld->server_on_recv_initial_metadata;
   }
 }
 
diff --git a/src/core/surface/validate_metadata.c b/src/core/surface/validate_metadata.c
index df2e80b..bf41268 100644
--- a/src/core/surface/validate_metadata.c
+++ b/src/core/surface/validate_metadata.c
@@ -50,7 +50,7 @@
 
 int grpc_header_key_is_legal(const char *key, size_t length) {
   static const uint8_t legal_header_bits[256 / 8] = {
-      0x00, 0x00, 0x00, 0x00, 0x00, 0x20, 0xff, 0x03, 0x00, 0x00, 0x00,
+      0x00, 0x00, 0x00, 0x00, 0x00, 0x60, 0xff, 0x03, 0x00, 0x00, 0x00,
       0x80, 0xfe, 0xff, 0xff, 0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
       0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
   if (length == 0) {
diff --git a/src/core/transport/chttp2/internal.h b/src/core/transport/chttp2/internal.h
index c611496..0e1e2c4 100644
--- a/src/core/transport/chttp2/internal.h
+++ b/src/core/transport/chttp2/internal.h
@@ -385,7 +385,7 @@
   grpc_closure *send_trailing_metadata_finished;
 
   grpc_metadata_batch *recv_initial_metadata;
-  grpc_closure *recv_initial_metadata_finished;
+  grpc_closure *recv_initial_metadata_ready;
   grpc_byte_stream **recv_message;
   grpc_closure *recv_message_ready;
   grpc_metadata_batch *recv_trailing_metadata;
diff --git a/src/core/transport/chttp2_transport.c b/src/core/transport/chttp2_transport.c
index 9298573..617d988 100644
--- a/src/core/transport/chttp2_transport.c
+++ b/src/core/transport/chttp2_transport.c
@@ -544,7 +544,7 @@
   GPR_ASSERT(s->global.send_initial_metadata_finished == NULL);
   GPR_ASSERT(s->global.send_message_finished == NULL);
   GPR_ASSERT(s->global.send_trailing_metadata_finished == NULL);
-  GPR_ASSERT(s->global.recv_initial_metadata_finished == NULL);
+  GPR_ASSERT(s->global.recv_initial_metadata_ready == NULL);
   GPR_ASSERT(s->global.recv_message_ready == NULL);
   GPR_ASSERT(s->global.recv_trailing_metadata_finished == NULL);
   grpc_chttp2_data_parser_destroy(exec_ctx, &s->parsing.data_parser);
@@ -863,9 +863,9 @@
   }
 
   if (op->recv_initial_metadata != NULL) {
-    GPR_ASSERT(stream_global->recv_initial_metadata_finished == NULL);
-    stream_global->recv_initial_metadata_finished =
-        add_closure_barrier(on_complete);
+    GPR_ASSERT(stream_global->recv_initial_metadata_ready == NULL);
+    stream_global->recv_initial_metadata_ready =
+        op->recv_initial_metadata_ready;
     stream_global->recv_initial_metadata = op->recv_initial_metadata;
     grpc_chttp2_list_add_check_read_ops(transport_global, stream_global);
   }
@@ -1009,13 +1009,14 @@
   grpc_byte_stream *bs;
   while (
       grpc_chttp2_list_pop_check_read_ops(transport_global, &stream_global)) {
-    if (stream_global->recv_initial_metadata_finished != NULL &&
+    if (stream_global->recv_initial_metadata_ready != NULL &&
         stream_global->published_initial_metadata) {
       grpc_chttp2_incoming_metadata_buffer_publish(
           &stream_global->received_initial_metadata,
           stream_global->recv_initial_metadata);
-      grpc_chttp2_complete_closure_step(
-          exec_ctx, &stream_global->recv_initial_metadata_finished, 1);
+      grpc_exec_ctx_enqueue(
+          exec_ctx, stream_global->recv_initial_metadata_ready, true, NULL);
+      stream_global->recv_initial_metadata_ready = NULL;
     }
     if (stream_global->recv_message_ready != NULL) {
       if (stream_global->incoming_frames.head != NULL) {
diff --git a/src/core/transport/transport.c b/src/core/transport/transport.c
index 08d6856..6e154b6 100644
--- a/src/core/transport/transport.c
+++ b/src/core/transport/transport.c
@@ -126,6 +126,7 @@
 void grpc_transport_stream_op_finish_with_failure(
     grpc_exec_ctx *exec_ctx, grpc_transport_stream_op *op) {
   grpc_exec_ctx_enqueue(exec_ctx, op->recv_message_ready, false, NULL);
+  grpc_exec_ctx_enqueue(exec_ctx, op->recv_initial_metadata_ready, false, NULL);
   grpc_exec_ctx_enqueue(exec_ctx, op->on_complete, false, NULL);
 }
 
diff --git a/src/core/transport/transport.h b/src/core/transport/transport.h
index f5cac77..8902c5d 100644
--- a/src/core/transport/transport.h
+++ b/src/core/transport/transport.h
@@ -92,6 +92,8 @@
 
   /** Receive initial metadata from the stream, into provided metadata batch. */
   grpc_metadata_batch *recv_initial_metadata;
+  /** Should be enqueued when initial metadata is ready to be processed. */
+  grpc_closure *recv_initial_metadata_ready;
 
   /** Receive message data from the stream, into provided byte stream. */
   grpc_byte_stream **recv_message;
@@ -103,7 +105,8 @@
   grpc_metadata_batch *recv_trailing_metadata;
 
   /** Should be enqueued when all requested operations (excluding recv_message
-     which has its own closure) in a given batch have been completed. */
+      and recv_initial_metadata which have their own closures) in a given batch
+      have been completed. */
   grpc_closure *on_complete;
 
   /** If != GRPC_STATUS_OK, cancel this stream */
diff --git a/src/node/performance/worker_server.js b/src/node/performance/worker.js
similarity index 100%
rename from src/node/performance/worker_server.js
rename to src/node/performance/worker.js
diff --git a/src/ruby/ext/grpc/extconf.rb b/src/ruby/ext/grpc/extconf.rb
index b7c6cb3..6b7001a 100644
--- a/src/ruby/ext/grpc/extconf.rb
+++ b/src/ruby/ext/grpc/extconf.rb
@@ -79,6 +79,7 @@
   ENV['EMBED_ZLIB'] = 'true'
   ENV['ARCH_FLAGS'] = RbConfig::CONFIG['ARCH_FLAG']
   ENV['ARCH_FLAGS'] = '-arch i386 -arch x86_64' if RUBY_PLATFORM =~ /darwin/
+  ENV['CFLAGS'] = '-DGPR_BACKWARDS_COMPATIBILITY_MODE'
 
   output_dir = File.expand_path(RbConfig::CONFIG['topdir'])
   grpc_lib_dir = File.join(output_dir, 'libs', grpc_config)
diff --git a/src/ruby/spec/client_server_spec.rb b/src/ruby/spec/client_server_spec.rb
index 594fda1..7ef5345 100644
--- a/src/ruby/spec/client_server_spec.rb
+++ b/src/ruby/spec/client_server_spec.rb
@@ -1,4 +1,4 @@
-# Copyright 2015, Google Inc.
+# Copyright 2015-2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -198,6 +198,7 @@
     # confirm the client can receive the server response and status.
     client_ops = {
       CallOps::SEND_CLOSE_FROM_CLIENT => nil,
+      CallOps::RECV_INITIAL_METADATA => nil,
       CallOps::RECV_MESSAGE => nil,
       CallOps::RECV_STATUS_ON_CLIENT => nil
     }
diff --git a/templates/binding.gyp.template b/templates/binding.gyp.template
index 7cee562..3ffbc06 100644
--- a/templates/binding.gyp.template
+++ b/templates/binding.gyp.template
@@ -57,7 +57,8 @@
             'UNICODE',
             '_UNICODE',
             'NOMINMAX',
-            'OPENSSL_NO_ASM'
+            'OPENSSL_NO_ASM',
+            'GPR_BACKWARDS_COMPATIBILITY_MODE'
           ],
           "msvs_settings": {
             'VCCLCompilerTool': {
@@ -80,7 +81,8 @@
             # supports ALPN. The target is "[major].[minor].[patch]". We split by
             # periods and take the first field to get the major version.
           'defines': [
-            'TSI_OPENSSL_ALPN_SUPPORT=<!(echo <(target) | cut -d. -f1)'
+            'TSI_OPENSSL_ALPN_SUPPORT=<!(echo <(target) | cut -d. -f1)',
+            'GPR_BACKWARDS_COMPATIBILITY_MODE'
           ],
           'include_dirs': [
             '<(node_root_dir)/deps/openssl/openssl/include',
diff --git a/test/core/fling/client.c b/test/core/fling/client.c
index 02db681..b36aef3 100644
--- a/test/core/fling/client.c
+++ b/test/core/fling/client.c
@@ -51,7 +51,7 @@
 static grpc_completion_queue *cq;
 static grpc_call *call;
 static grpc_op ops[6];
-static grpc_op stream_init_op;
+static grpc_op stream_init_ops[2];
 static grpc_op stream_step_ops[2];
 static grpc_metadata_array initial_metadata_recv;
 static grpc_metadata_array trailing_metadata_recv;
@@ -105,13 +105,17 @@
 }
 
 static void init_ping_pong_stream(void) {
+  grpc_metadata_array_init(&initial_metadata_recv);
+
   grpc_call_error error;
   call = grpc_channel_create_call(channel, NULL, GRPC_PROPAGATE_DEFAULTS, cq,
                                   "/Reflector/reflectStream", "localhost",
                                   gpr_inf_future(GPR_CLOCK_REALTIME), NULL);
-  stream_init_op.op = GRPC_OP_SEND_INITIAL_METADATA;
-  stream_init_op.data.send_initial_metadata.count = 0;
-  error = grpc_call_start_batch(call, &stream_init_op, 1, (void *)1, NULL);
+  stream_init_ops[0].op = GRPC_OP_SEND_INITIAL_METADATA;
+  stream_init_ops[0].data.send_initial_metadata.count = 0;
+  stream_init_ops[1].op = GRPC_OP_RECV_INITIAL_METADATA;
+  stream_init_ops[1].data.recv_initial_metadata = &initial_metadata_recv;
+  error = grpc_call_start_batch(call, stream_init_ops, 2, (void *)1, NULL);
   GPR_ASSERT(GRPC_CALL_OK == error);
   grpc_completion_queue_next(cq, gpr_inf_future(GPR_CLOCK_REALTIME), NULL);
 
diff --git a/test/cpp/end2end/async_end2end_test.cc b/test/cpp/end2end/async_end2end_test.cc
index 252bda3..a194c61 100644
--- a/test/cpp/end2end/async_end2end_test.cc
+++ b/test/cpp/end2end/async_end2end_test.cc
@@ -479,8 +479,10 @@
   send_request.set_message("Hello");
   std::pair<grpc::string, grpc::string> meta1("key1", "val1");
   std::pair<grpc::string, grpc::string> meta2("key2", "val2");
+  std::pair<grpc::string, grpc::string> meta3("g.r.d-bin", "xyz");
   cli_ctx.AddMetadata(meta1.first, meta1.second);
   cli_ctx.AddMetadata(meta2.first, meta2.second);
+  cli_ctx.AddMetadata(meta3.first, meta3.second);
 
   std::unique_ptr<ClientAsyncResponseReader<EchoResponse>> response_reader(
       stub_->AsyncEcho(&cli_ctx, send_request, cq_.get()));
@@ -494,6 +496,8 @@
             ToString(client_initial_metadata.find(meta1.first)->second));
   EXPECT_EQ(meta2.second,
             ToString(client_initial_metadata.find(meta2.first)->second));
+  EXPECT_EQ(meta3.second,
+            ToString(client_initial_metadata.find(meta3.first)->second));
   EXPECT_GE(client_initial_metadata.size(), static_cast<size_t>(2));
 
   send_response.set_message(recv_request.message());
diff --git a/test/distrib/python/distribtest.py b/test/distrib/python/distribtest.py
index 66c1f88..dc20688 100644
--- a/test/distrib/python/distribtest.py
+++ b/test/distrib/python/distribtest.py
@@ -1,4 +1,4 @@
-# Copyright 2015-2016, Google Inc.
+# Copyright 2016, Google Inc.
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
diff --git a/tools/README.md b/tools/README.md
index eb6633a..a0c41eb 100644
--- a/tools/README.md
+++ b/tools/README.md
@@ -8,6 +8,8 @@
 
 doxygen: gRPC C/C++ documentation generation via Doxygen.
 
+gce: scripts to help setup testing infrastructure on GCE.
+
 jenkins: support for running tests on Jenkins.
 
 profile_analyzer: pretty printer for gRPC profiling data.
diff --git a/tools/buildgen/plugins/list_api.py b/tools/buildgen/plugins/list_api.py
index 3396dcd..ff937a0 100755
--- a/tools/buildgen/plugins/list_api.py
+++ b/tools/buildgen/plugins/list_api.py
@@ -37,7 +37,7 @@
 import yaml
 
 
-_RE_API = r'(?:GPR_API|GRPC_API|CENSUS_API)([^;]*);'
+_RE_API = r'(?:GPRAPI|GRPCAPI|CENSUSAPI)([^;]*);'
 
 
 def list_c_apis(filenames):
diff --git a/tools/codegen/core/gen_legal_metadata_characters.c b/tools/codegen/core/gen_legal_metadata_characters.c
index 3c9e1c7..10605d5 100644
--- a/tools/codegen/core/gen_legal_metadata_characters.c
+++ b/tools/codegen/core/gen_legal_metadata_characters.c
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright 2015, Google Inc.
+ * Copyright 2015-2016, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -52,7 +52,7 @@
 static void dump(void) {
   int i;
 
-  printf("static const gpr_uint8 legal_header_bits[256/8] = ");
+  printf("static const uint8_t legal_header_bits[256/8] = ");
   for (i = 0; i < 256 / 8; i++)
     printf("%c 0x%02x", i ? ',' : '{', legal_bits[i]);
   printf(" };\n");
diff --git a/tools/gce/create_linux_worker.sh b/tools/gce/create_linux_worker.sh
new file mode 100755
index 0000000..2a9e77a
--- /dev/null
+++ b/tools/gce/create_linux_worker.sh
@@ -0,0 +1,60 @@
+#!/bin/bash
+# Copyright 2015-2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+# Creates a standard jenkins worker on GCE.
+
+set -ex
+
+cd $(dirname $0)
+
+CLOUD_PROJECT=grpc-testing
+ZONE=us-central1-a
+
+INSTANCE_NAME=grpc-jenkins-worker1
+
+gcloud compute instances create $INSTANCE_NAME \
+    --project="$CLOUD_PROJECT" \
+    --zone "$ZONE" \
+    --machine-type n1-standard-8 \
+    --image ubuntu-14-04 \
+    --boot-disk-size 1000
+
+echo 'Created GCE instance, waiting 60 seconds for it to come online.'
+sleep 60
+
+gcloud compute copy-files \
+    --project="$CLOUD_PROJECT" \
+    --zone "$ZONE" \
+    jenkins_master.pub linux_worker_init.sh ${INSTANCE_NAME}:~
+
+gcloud compute ssh \
+    --project="$CLOUD_PROJECT" \
+    --zone "$ZONE" \
+    $INSTANCE_NAME --command "./linux_worker_init.sh"
diff --git a/tools/gce/jenkins_master.pub b/tools/gce/jenkins_master.pub
new file mode 100644
index 0000000..e985322
--- /dev/null
+++ b/tools/gce/jenkins_master.pub
@@ -0,0 +1 @@
+ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDzj9l7Tp4yKnMV8sSMNvm5Q9v/F2F187xF93niJFY8lz6ig4bhusqvNbAxPoeypds9NYjLDK6kONN9teemgv2+IcmmlAI4wkCkkWcL/kzdNNH0h5J7+YbPiUGFAu0hZNHg5jzwrZ3VFKwv6d/7dUdPOYmPaOG1JOEcxXcBvm1hMIe474jpUTTiG4/gMDJ1GhMg5T3cuCm2l0gCiv7ybRAgwaZ2EKEEWLy9qAL/pnr3umBjQvzAUGcOgXJyG0mbr977YdJo9kb+EELRTVN2q8mKZJEZ1BJAylkaI9783K2+cGaM8hPtKFcX4ImEYEkWgfOyGNolGDquWtvusGGzQXwF jenkins@grpc-jenkins-master
diff --git a/tools/gce/linux_worker_init.sh b/tools/gce/linux_worker_init.sh
new file mode 100755
index 0000000..f56cac0
--- /dev/null
+++ b/tools/gce/linux_worker_init.sh
@@ -0,0 +1,70 @@
+#!/bin/bash
+# Copyright 2015-2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+# Initializes a fresh GCE VM to become a jenkins linux worker.
+# You shouldn't run this script on your own, use create_linux_worker.sh
+# instead.
+
+set -ex
+
+sudo apt-get update
+
+# Install JRE
+sudo apt-get install -y openjdk-7-jre
+sudo apt-get install -y unzip lsof
+
+# Install Docker
+curl -sSL https://get.docker.com/ | sh
+
+# Setup jenkins user (or the user will already exist bcuz magic)
+sudo adduser jenkins --disabled-password || true
+
+# Enable jenkins to use docker without sudo:
+sudo usermod -aG docker jenkins
+
+# Use "overlay" storage driver for docker
+# see https://github.com/grpc/grpc/issues/4988
+echo 'DOCKER_OPTS="${DOCKER_OPTS} --storage-driver=overlay"' | sudo tee --append /etc/default/docker
+
+# Install RVM
+# TODO(jtattermusch): why is RVM needed?
+gpg --keyserver hkp://keys.gnupg.net --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3
+curl -sSL https://get.rvm.io | bash -s stable --ruby
+
+# Add pubkey of jenkins@grpc-jenkins-master to authorized keys of jenkins@
+# This needs to happen as the last step to prevent Jenkins master from connecting
+# to a machine that hasn't been properly setup yet.
+cat jenkins_master.pub | sudo tee --append ~jenkins/.ssh/authorized_keys
+
+# Restart for docker to pickup the config changes.
+echo 'Successfully initialized the linux worker, going for reboot in 10 seconds'
+sleep 10
+
+sudo reboot
diff --git a/tools/run_tests/artifact_targets.py b/tools/run_tests/artifact_targets.py
index 74d2a48..9cd02c5 100644
--- a/tools/run_tests/artifact_targets.py
+++ b/tools/run_tests/artifact_targets.py
@@ -175,7 +175,8 @@
     else:
       environ = {'CONFIG': 'opt',
                  'EMBED_OPENSSL': 'true',
-                 'EMBED_ZLIB': 'true'}
+                 'EMBED_ZLIB': 'true',
+                 'CFLAGS': '-DGPR_BACKWARDS_COMPATIBILITY_MODE'}
       if self.platform == 'linux':
         return create_docker_jobspec(self.name,
             'tools/dockerfile/grpc_artifact_linux_%s' % self.arch,
diff --git a/tools/run_tests/build_node.bat b/tools/run_tests/build_node.bat
new file mode 100644
index 0000000..6896bc1
--- /dev/null
+++ b/tools/run_tests/build_node.bat
@@ -0,0 +1,30 @@
+@rem Copyright 2016, Google Inc.
+@rem All rights reserved.
+@rem
+@rem Redistribution and use in source and binary forms, with or without
+@rem modification, are permitted provided that the following conditions are
+@rem met:
+@rem
+@rem     * Redistributions of source code must retain the above copyright
+@rem notice, this list of conditions and the following disclaimer.
+@rem     * Redistributions in binary form must reproduce the above
+@rem copyright notice, this list of conditions and the following disclaimer
+@rem in the documentation and/or other materials provided with the
+@rem distribution.
+@rem     * Neither the name of Google Inc. nor the names of its
+@rem contributors may be used to endorse or promote products derived from
+@rem this software without specific prior written permission.
+@rem
+@rem THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+@rem "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+@rem LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+@rem A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+@rem OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+@rem SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+@rem LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+@rem DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+@rem THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+@rem (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+@rem OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+npm install --build-from-source
\ No newline at end of file
diff --git a/tools/run_tests/pre_build_node.bat b/tools/run_tests/pre_build_node.bat
new file mode 100644
index 0000000..6e7cbe5
--- /dev/null
+++ b/tools/run_tests/pre_build_node.bat
@@ -0,0 +1,39 @@
+@rem Copyright 2016, Google Inc.
+@rem All rights reserved.
+@rem
+@rem Redistribution and use in source and binary forms, with or without
+@rem modification, are permitted provided that the following conditions are
+@rem met:
+@rem
+@rem     * Redistributions of source code must retain the above copyright
+@rem notice, this list of conditions and the following disclaimer.
+@rem     * Redistributions in binary form must reproduce the above
+@rem copyright notice, this list of conditions and the following disclaimer
+@rem in the documentation and/or other materials provided with the
+@rem distribution.
+@rem     * Neither the name of Google Inc. nor the names of its
+@rem contributors may be used to endorse or promote products derived from
+@rem this software without specific prior written permission.
+@rem
+@rem THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+@rem "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+@rem LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+@rem A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+@rem OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+@rem SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+@rem LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+@rem DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+@rem THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+@rem (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+@rem OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+@rem Expire cache after 1 week
+npm update --cache-min 604800
+
+npm install node-gyp-install
+.\node_modules\.bin\node-gyp-install.cmd
+
+@rem delete the redundant openssl headers
+for /f "delims=v" %%v in ('node --version') do (
+  rmdir "%HOMEDRIVE%%HOMEPATH%\.node-gyp\%%v\include\node\openssl" /S /Q
+)
\ No newline at end of file
diff --git a/tools/run_tests/run_node.bat b/tools/run_tests/run_node.bat
new file mode 100644
index 0000000..f5cf01f
--- /dev/null
+++ b/tools/run_tests/run_node.bat
@@ -0,0 +1,32 @@
+@rem Copyright 2016, Google Inc.
+@rem All rights reserved.
+@rem
+@rem Redistribution and use in source and binary forms, with or without
+@rem modification, are permitted provided that the following conditions are
+@rem met:
+@rem
+@rem     * Redistributions of source code must retain the above copyright
+@rem notice, this list of conditions and the following disclaimer.
+@rem     * Redistributions in binary form must reproduce the above
+@rem copyright notice, this list of conditions and the following disclaimer
+@rem in the documentation and/or other materials provided with the
+@rem distribution.
+@rem     * Neither the name of Google Inc. nor the names of its
+@rem contributors may be used to endorse or promote products derived from
+@rem this software without specific prior written permission.
+@rem
+@rem THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+@rem "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+@rem LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+@rem A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+@rem OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+@rem SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+@rem LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+@rem DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+@rem THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+@rem (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+@rem OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+set JUNIT_REPORT_PATH=src\node\reports.xml
+set JUNIT_REPORT_STACK=1
+.\node_modules\.bin\mocha.cmd --reporter mocha-jenkins-reporter src\node\test
\ No newline at end of file
diff --git a/tools/run_tests/run_tests.py b/tools/run_tests/run_tests.py
index f405866..de3716b 100755
--- a/tools/run_tests/run_tests.py
+++ b/tools/run_tests/run_tests.py
@@ -195,16 +195,22 @@
 class NodeLanguage(object):
 
   def __init__(self):
+    self.platform = platform_string()
     self.node_version = '0.12'
 
   def test_specs(self, config, args):
-    return [config.job_spec(['tools/run_tests/run_node.sh', self.node_version],
-                            None,
-                            environ=_FORCE_ENVIRON_FOR_WRAPPERS)]
+    if self.platform == 'windows':
+      return [config.job_spec(['tools\\run_tests\\run_node.bat'], None)]
+    else:
+      return [config.job_spec(['tools/run_tests/run_node.sh', self.node_version],
+                              None,
+                              environ=_FORCE_ENVIRON_FOR_WRAPPERS)]
 
   def pre_build_steps(self):
-    # Default to 1 week cache expiration
-    return [['tools/run_tests/pre_build_node.sh', self.node_version]]
+    if self.platform == 'windows':
+      return [['tools\\run_tests\\pre_build_node.bat']]
+    else:
+      return [['tools/run_tests/pre_build_node.sh', self.node_version]]
 
   def make_targets(self, test_regex):
     return []
@@ -213,7 +219,10 @@
     return []
 
   def build_steps(self):
-    return [['tools/run_tests/build_node.sh', self.node_version]]
+    if self.platform == 'windows':
+      return [['tools\\run_tests\\build_node.bat']]
+    else:
+      return [['tools/run_tests/build_node.sh', self.node_version]]
 
   def post_tests_steps(self):
     return []